It's simply a hat. Things like Jarate and Mad Milk don't affect hats, last I've heard, so I doubt it'll show on this hat. I'm also certain that hats don't change expression, so a foam mascot hat shouldn't get sad or mad or anything else. Think of them as the mascot guys at Disneyworld. Sure, pushing Mickey over would make him upset, but his foam mask doesn't mold to his expression.

Also, I wouldn't consider a mascot that is trying to shoot you innocent. :P

lol