So as the title suggests this thread is about the bad habits we all see and in some cases are guilty of.
I personally know I am guilty for not using effective hand gestures and not shoulder checking on the bike often enough. I also have been known to ride on sidewalks on occasion.
Personally I hate to see cyclists who completely ignore the rules of the road. Running reds, lane splitting. I also really hate seeing riders not wearing helmets or using lights in the dark, just plain stupid.
Squeaky chains are annoying too, but that's just my perfectionist tendencies coming through.
How bout you guys?