Bats have very sharp, fine teeth and can bite you without you knowing they did so!
All North American bats are either insectivores or frugivores. Neither is predisposed to biting humans. Unless it’s inside your dwelling, the best practice is to get out of its way and let it go about its business. If you see one acting aggressively or bizarrely, which might give you to think it is rabid, I recommend a flame thrower. http://bit.ly/2vpTUkZ (j.k.)
Besides being fascinating critters (the only mammals capable of sustained flight), they also are important to agriculture. They’re the primary mechanism of cross-pollination for both banana trees and the agave plant. Without bats, there’s be no tequila. So the next time you’ve got one in your house, do the neighborly thing and offer it a margarita to leave.
As someone who has been bitten by a bat it hurts like hell. I was bitten in the hand. It was like being squeezed with pliers trying to rip the skin off.