Never actually been intimidated by bikers, it might be an American thing, but I never see them as tough guys, usually they are just blokes that like bikes, and slayer, and games workshop n that.
I'm sure if they were hoodies or drunk football thugs I would have pussied out, but bikers usually seem like big softies to me.
Over here they are just bike enthusiasts. In American Biker gangs are fucking nutters.