Take pictures of cosplayers across an aisle. (I will not stop for these people anymore so you may get a side view of my irritated face instead of the cosplayer you intended).
Try to dictate the moves of other players and effectively play the game solo.
Run into the exhibit hall when the doors open and knock all competitors for your line out of the way.
Proceed to the front of a line and argue that you should be able to make your purchase regardless of the 50 people you line jumped.
(But really, don't do these things....they're all just bad.....)
See the update to terms of service that specifically says you're not supposed to block aisle for photos at all?