Bicycles are becoming the "in green thing" here and are so often a menace in traffic. They don't follow any rules of the road and you never know what they're going to do next when you approach them on the street. They violate all common sense. Hand signals don't exist; they weave in and out of traffic, up on the sidewalk, back onto the street and race along sidewalks at high speed scaring the bee jeepers out of pedestrians.
I can't tell you how many times I've been buzzed too close for comfort on the sidewalk by a bicyclist from behind when you have no idea they're coming upon you.
They whine and complain that they don't get any respect on the street. If they want respect they will have to earn it.