Quoted from rosh:you know how at swimming pools they have signs 'must shower before entering pool', well, we need a similar sign at the entry to expo. Or maybe we need the 'greeters' at the doors to do a sniff test. "sorry, you smell like crap, you need to go shower and put on deodorant before you can enter"
My idea for cons(any of 'em)would be to have some deodarant company give out free samples of their product like you see at festivals/fairs. It's the ultimate beta test area.