This is really the only time of the year where it's legal and fun to mask your identity. Think about it. If you were to walk into a bank dressed like Darth Vader and it wasn't Halloween or go a political rally dressed like Osama bin Ladin and wasn't Halloween, what would happen? Five-O would be called in. The joy of forgetting who and what you're about is always fun. It's called escape.
It would be great if the escape key on the keyboard could actually help us do that.