Yeah, so far as I can ascertain they're already planning to close off more bits of the con, put up more security, do more badge-checking.

One of the troubles with having the event in the series of hotels instead of a convention center, apparently folks coming to town for the Labor Day ballgame have figured out that they can get a cheap rate at the con hotels. Which leads to the combustible mixture of crowds. There were apparently a few different kinds of ugliness to deal with this year, aside from just what Conni linked to, fights and drunk stupidity and garden-variety overcrowding.