Why do a lot of people kills BAT...?

I don't know. But it is better one should not kills Bat.

I don't know, probably a combination of vampire movies and rabies that scares people. They're so beneficial for the environment, and real good at keeping the mosquito populations down. Been meaning to build a bat box, will get around to it one of these days lol.

I refuse to let my hubby kill a bat if he finds 1. (He is a contractor/carpenter, so he works on alot of different types of buildings) He has even gone so far as to start bringing them home so we can release them. Over the years of being involved in 4-H, I have put together many many bat houses. My kids will be making some new ones soon as well. We place them all around the yard and relatives yards as well. I just love the idea of being able to sit in the yard during warm weather and not being bitten constantly by mosquitoes and things, or being infected by diseases carried by those bugs, because of having so many bats in our neighborhood that eat those nasty little bugs.