That depends on which type of Bat you mean ? some keep insect levels down, other spread seeds for regrowth.
P.s some are part of the food chain
To say its fun to hang upside down when you sleep, at times u can use one sense for another - like how they use their ultrasonic(so cool) sound to navigate...nocturnal & sleeping all day is fun....Oh come on, leave the poor bats out of this !
For hitting sixes with. The other kind are for Halloween.