Enough people to warrant there being a law against it - I should note that I used to have a life size cut out of Harry Potter, which, on the last day of term I stuck up on the roof of my halls, adorned with thongs and suspender belts, just so all the parents picking their kids up got a view of Harry spearing someone's lacy underwear with his sword.
Do you know what else?
WE'VE KILLED THE THREAD!