Regarding location, the only two other places they would consider is either the convention center in Edison which has even less stuff, or somewhere in NYC now that NYAF is pretty much dead, which I think they would be reluctant to do. I remember the last year in Seacacus they had to put some of the stuff in the parking lot which was the dumbest thing they have ever done.
And yeah, con etiquette is a huge problem, mostly because the underage don't know how to behave but there are other reasons as well. That fire alarm at 3 AM sunday was a pain in the ass and it was because of two idiots who think doing stupid stuff is funny. Honestly, I would say that if con goers can't behave, they would have to tighten up the rules until people know the difference between having fun and doing stuff in expense of other people.
Cosplaying for 2012
unknown at this time