I guess it is like speed limits. Someone is always going to exceed them. And as a matter of personal disclosure, I did bring some beer along on a cruise once. I hadn't planned on it but had a few loose cans left from our hotel stay the night before. So they got tossed in the carry-on along with everything else that embarkation morning since I couldn't bear to leave them or trash them. This was on the Holiday in 2005.