I guess you could always chalk it up to basic Bat-paranoia?

Also 
[hider=Joining in on the Bat-themed Valentines stuff]
[img]http://data3.whicdn.com/images/162572950/large.jpg[/img]
[/hider]


[hider=Also this one, because dark humor]
[img]https://s-media-cache-ak0.pinimg.com/736x/76/41/a9/7641a9dede106e04d51f319d9451f211.jpg[/img]
[/hider]