There was a note on the dealer's room FAQ that said no stickers, so I e-mailed their liaison, and yup - there's not supposed to be any stickers, anywhere. It's in the contract with the hotel, because idiots like to stick them all over hotel property and ruin them. So I kinda expected it, which is why I looked into it at all.

Not sure what year that started, and I'm sure some people do it anyway, but I'm too much of a goody-two-shoes to tempt it.