St. Louis is infamous for the number of stop signs. Usually people slow to 3-5 miles per hour in their car and then roll through them... a 'st. louis stop'. On my bike, I'm traveling at about that speed when I roll them, so I'm fine with it. Naturally I stop if it's not my turn, just as I would with a car.

Red lights are a different story. In the morning when I am commuting to work at 5:30 and no cars are around whatsoever, I will ride through red lights. Not all of them trigger (it's even more frustrating when I'm on my registered scooter-- at which time I'll do that convoluted loop to get through it), and in those cases I'll go over to the cross walk and cross there.

If cars are around though, I make a point to be on my best behavior. I do not want to give drivers any more reason to be angry toward cyclists-- people really do lose their senses over them and car vs. bike is a losing battle for us. Being a courteous cyclist around autos may not do a whole lot (inevitably some asshat will do something stupid to set them off on all of us), but it's something!