If you've ever been to a large anime convention (think Otakon size or bigger), then you know that things can get a LITTTTTLE intense, especially in dealers....
So you've gotta have a SURVIVAL STRATEGY!!!
Just like Legendary Girl A, you know ;P
But really, anime cons in the US aren't CRAZY like this, as far as my experiences go. Still, use this Lucky Star ep as a reference to prep for you con, and you'll most likely be over prepared!!!