+1 Three.

I particularly hate the multi-use paths we have in Florida that are built alongside through streets, sometimes crossing from one side to the other. It really blurs the distinction between sidewalks and multi-use trails, encourages drivers (and riders!) to believe that bikes don't belong on the road, and creates extremely unsafe crossings. It's a particular problem for roadies using the same streets, avoiding the trails for all the same reasons roadies usually avoid them (unpredictable animals and pedestrians, very slow speed, lots of broken glass). I sure don't have the energy to become an activist, but I wish someone would do something to raise cycling safety around here.