The only reasons they get close to peoples' hair are they are outside, their heat attracts mosquitoes, and bats eat mosquitoes. A lot of people think bats are blind. Only microbats cannot see that well, but they aren't blind. Also, bats can get rabies, but less than 1 percent of them actually get rabies. If you are a teenager, you won't believe this.
Most people think bats are filthy creatures, but bats are cleaner than cats.
Don't fear vampire bats. They only suck blood from animals. Actually, they don't even suck blood. They make a small cut and lick the blood.