Unsavory as you may find these "cyclists", they are on bicycles. Im sure the public would rather not deal with "drunk motorists" or "uninsured motorists" but they have to anyway. I don't think we get to pick and choose who we want the term cyclists to apply to. How different would that be from road bikers not wanting to call freeriders cyclists or bent riders not being afforded entry into the cycling community.

As Kerlenbach says (although I think his meaning is different from mine) "To the public, they're all cyclists."