They need to cut down on people cheating their way into the exhibit hall......I read somewhere that people were bringing their kids to get childrens badges and then giving them to adult friends who were walking right into the exhibit hall. Because there are so many people coming in and out, it's hard for security to check them all properly.
Also, we had a vendor tell us that what they do to bring people in is the old, two people come in, one goes back out with both badges and that person brings a third in trick....because once you're in the exhibit hall, they don't really monitor people to make sure everyone has a proper badge.
Also on preview night, I noticed a lot of people who had some sort of PN sticker instead of a badge. Not sure what those were for exactly, but would be super easy for me to scan one of those stickers and reprint it on sticker paper. I'm sure people copy badges as well...