it used to be law that bicyclists had to ride single file. is that law no longer in effect? i take great issue with a pack of riders who are 3 or 4 bikes wide. they usually move slower and hold the cars behind them. even guys who ride 2 people wide create a lot of problems, especially on smaller streets.
i'm also tired of bike riders who don't follow traffic laws, ESPECIALLY with stop signs, traffic lights, and crosswalks. they create far more safety hazards than they may realize.
we also have a problem in that most older city streets weren't built wide enough to accomodate bicyclists, yet cyclists want plenty of room.