I agree, I'm annoyed whenever I see a cyclist not obeying the law.  It causes bad vibes on all levels and creates a more dangerous ride. 

I don't think it is a weight sensor, it is actually a magnet.  I don't think that's really germane to anything, just thought I'd mention it.

Seriously- aren't there better things to worry about? I mean why get worked up over someone elses actions? I absolutely hate smokers that flip thier cigs out the window when they're done but I never consider chasing them down and I certainly don't flip them off. Cell phone drivers or make-up applyers while driving annoy me too. We all do things that annoy someone else. Thats the beauty of individuality.

I run red lights on my bike when I feel its safe too-

Because if WE, as car drivers did it, we'd get a ticket! If I'm in my car sitting at the lights and no one else is there do I go? Nooooooooooo of course I don't.  Why should bikers get off Scot free!? They have to obey to road rules just as drivers do and that goes for chatting on yer cell phone while cycling too. Flipping cigs out of your window here is also a crime and $101 ticket if you get caught. You should chase them down, it's one of the reasons so many brush fires are started.

Just came across this:

If you are in the habit of running red lights then we would like you to consider this:

• It directly affects the way that we are treated every day on the streets by other road users.
  As a vulnerable road user, how would you like to be treated?
• It directly affects our chance of enhancing our status as road users under the law.
  A bicycle is classed as a vehicle like any other. Everyone knows that this leads to absurdities and anomalies in the way that the law is applied to cyclists in practice. Cycle campaigners are lobbying hard to remedy this; but politicians are unlikely to sign up to enhancing the legal status of an unpopular group of lawbreaking social outcasts.
• It also undermines our chances of getting improved facilities.
  Better cycle routes are usually funded by taxpayer's money. How can we make a case for better funding when our image in the media is of a group that shows comtempt for the law and for other road users?

A wrong is a wrong.  If you choose to do a wrong act, don't get pissed off when others are startled/angry by the act. 

If I run a stop sign, it was my down damn fault to get yelled at.  Just my 2 cents. 

I admit, I'm guilty of rolling through when traffic is light or nonexistent, although I'm less likely to roll through a light than a sign.  First, I always set up as though I'm going to stop, so that I can if I have to.  With no traffic (early a.m. on weekend, residential streets), I'll slow to a near stop while looking both ways.  Or, if it's really obviously clear, I'll roll a slow right turn w/ no stop.  With light to moderate or greater traffic, I definitely practice vehicular cycling.

Basically I'll always ride like I can get squished like a bug.  Sitting around solo in the middle of the road at a light or a sign is just asking to get mowed down by a driver who isn't paying attention.  Blowing lights w/o the ability to stop, at any speed (5-10mph or more) is imho crazy, regardless of time, but I don't see getting really worked up over it. 

Now, about cyclists who ride on the sidewalk when I'm trying to run or walk with my kids.  THAT's something I get worked up about

Stop Signs:   Going downhill and flat, generally I do a track stand and stop completely.  Downhill seems the most dangerous, because last-moment stopping is more difficult.  Uphill, if no traffic, I slow to maybe 3 mph and go if it's clear, otherwise trackstand and wait my turn.  There are a couple stop signs in residential areas where it's a three-way intersection and/or I have good visibility and my speeds are moderate, so sometimes I roll those ones if it's completely clear.

Red Lights: If I can trigger the light, either by loop or an easily accessible pedestrian button, I wait.  If cars are going the same direction and will trigger it for me, I wait.  If I can't trigger the light, I will go when there is no risk of from traffic.  Sorry, but if the infrastructure isn't built to accommodate my bicycle, there are not many options.  If I were in a car and the light wouldn't trigger, I wouldn't get out of my car and walk across lanes to the pedestrian button.

I just finished working with the city traffic engineer to improve the loop sensitivity on a couple lights, and now I can trigger them from my bike.  Depending on the municipality, you might find that to be the best approach.  They can't always dial things up enough to make it work for bikes, but it's worth the effort if it is a problem light on your regular route.

Earlier this week while driving, I nearly collided with a cyclist at 5:30 am when he blew through a four-way stop at good speed directly in front of me.  Dumb. 

I had a close call riding once about a year ago when I braked too late for a stop sign on a steep downhill.  I am far more cautious now.  I got lucky, the driver was paying attention.

OFF TOPIC--> you can get this little device that will trigger the magnet to work the light. I have one for my motorcycle since I got annoyed waiting for the light. I"d more likely get a ticket on the motorcycle then bicycle.

sorry for the sidebar

Ditto.

Because in most states bikes are considered vehicles.  Stopping at a red light is the law.  Unless you get off and walk and then you are a pedestrian.  Just because a bike path/lane crosses an intersection doesn't mean cyclists are free to run red lights or stop signs.

I will admit that I am indeed not perfect ( ), but I will almost always at least come to a complete stop at a red light.  I do it mainly for adding good karma for bicyclists.  I am just trying to be good so motor vehicle drivers can see what good bicycling looks like.  Many times I come up to a red light that I could easily pass through because there is only traffic far in the distance, but I will stop and wait.  If that car off in the distance passes through the intersection and sees a bicyclist obeying traffic laws that is good karma for all bicyclists!    For whatever reason, I am more apt to roll through a stop sign, but I always slow down to a near complete stop before going.   Of course I do that in my car too.  Yikes!

Sometimes when we are in a group that people associate with being rude, dangerous, illegal or having bad etiquette, sometimes you have to go out of your way to follow the letter of the law and be polite.  It's the ol' catching more flies with honey routine.