Quoted from epthegeek:This isn't the concern some people seem to think it is, at least not yet. Maybe if there's a mass collusion effort to team up this year and have 5 people all try to get 5 tickets while sitting in a chat of some kind and then have one person who actually gets them finalize the purchase - but I can't imagine people will actually make that type of coordinated effort.
This happened last year, I know several different groups that participated. My pin network is pretty small, so I can only image it was pretty wide-spread.