I voted "depends"
I prepare to stop at all intersections even ones without signs or
signals. and if I'm riding with a group of cars I follow the rules
so they know what I'm doing. I will look for right turn signals and wait behind them to make there turn. if I dont see a signal I will go to the front and look at the driver making sure he/she knows I'm there. then will lead the ligth so that I have a good pedal going by the time they start. ( dont want to be putting foot in pedals when cars are passing me). I try to do what is expected.
and follow the rules. to many blind spots on the road and to many drivers that dont know how to drive in mixed traffic(sp) ...
just my .02 worth