Dogs are dogs, and do what dogs do. They'll chase and attack out of either a hunting or protective instinct or both. They chase bicycles because we're running away, meaning that we're vulnerable prey, or intruders, who by running prove that we don't belong there. The fact that we run when chased only reinforces those notions.

So expecting different from dogs is pointless. It's their owners from whom we need to demand more care, and sadly sometimes the only thing that works are big bills and/or the real threat of having the dog destroyed. Warning, some owners aren't all that threatened by the destruction of their dog, they just get another one, so only something that threatens the owner himself works.