Bats would fit into this category. I personally think that they are kinda cute.

AND I love the fact that they eat mosquito's (which is a WONDERFUL friend to have in the south) Bat's eat around 250,000 pounds of insects a night. I suppose many people are scared of them due to rabies or Ozzy lol. I haven't heard of a rabid bat swarm, targeting humans however.
http://articles.latimes.com/1994-02-...17_1_bat-house