I hate when people think that bikes should follow EXACTLY the laws of cars. I know we're supposed to, however, since we have such a low chance of killing someone, a lot is left up to a persons own feelings of what they feel is safe. If I blow a stop sign at a 4 way stop, who cares? I can clearly see if a car is coming on either end, and its my own risk to blow it, since I'm the one who is ****ed if another car blows the stop sign. Certain rules do have to be obeyed, however, passing a car on the left (like you should) and blowing a red are things that are not a huge deal to anyone besides yourself.

I try to follow the rules of the jungle when it comes to city riding. Whatever doesn't kill you is a good idea.