I still find it amazing that in today's highly educated society, people still act like morons when it comes to animals. Just because an animal, dog or otherwise, has been domesticated, it doesn't make it harmless. Under certain circumstances any dog can become vicious (even those cute little fluffies!!) and from what I've experienced at local off-leash parks, it seems to be the small molly-coddled dogs who go after the bigger ones. Call it small dog syndrome or whatever, I trust these little annoyances less than the local bull mastiff cross and staffys who tend to be big sweethearts.
Mostly I think all humans need animal education and to stop assuming that pet = friendly because that's not always entirely true.