http://www.flayrah.com/c/anthrocon-bans-fur-over-open-carryOkay, gist of this is PA allows both concealed (with permit) carry and open (with or without) carry of firearms. Some cities/townships (Filthadelphia mainly) have harsher laws, but in general PA is like Texas used to be. However, at AC, CC is discouraged because it's against hotel policy.
So this guy, Ross*, decides he wants to be the next Groat or something and gets busted once on a bullshit OC charge, and once on a legit charge (he carries into an Airport, which is beyond retarded). So Conway decides to stick is nose into this and basically says that because Ross can't keep out of trouble, basically bans the guy from AC. Some may see how this could be a concern, but it carries over from a tradition of Conway banning people from AC for things unrelated to the most part to AC.
As to whether or not one needs to be armed in that part of Pittsburgh, well it's not as clear cut as I'm sure the staff will comment that it is.
The Greatest irony being that the DLL convention center is hosting the NRA gunshow in 2011...
*Last name is Ross, it's not Sibe.