u/Ok_Zone_7635

I know this might seem silly, but actually think about it.

If you were in Gotham and you were walking down a street and out of a dark alley came a 6'4" man in a bat costume with a big smile on his face you'd probably be scared or at the very least highly unsettled.

Whoever this guy is, he is clearly out of his mind.

Don't get me wrong, you could still have that reaction if he wasn't smiling. But seeing him with a big grin on his face just adds a level of discomfort.

Gotham at night is a dangerous environment. Anyone with that big of grin on their face couldn't be up to anything except trouble