No offense, but if I saw someone dressed like that on the street cheering at a bunch of bikers, I wouldn't be surprised if they get their Pikachu asses whooped on the spot. Or, get turned down at a job interview. Or, not get let into some restaurants.
I'm not picking beef with you, I'm just responding how a lot of people that live where I live would respond. Hallowe'en happens once a year, and that's more than enough for me.