Unless you go to really sketchy private parties in people's hotel rooms, you're probably better off at Defcon overall now than in Vegas otherwise. (Also, I strongly suggest the majority of inappropriate behavior is by the younger attendees; most of the people who have been going to Defcon since the AP or earlier are now in their 30s, many married/kids, have real jobs which mean they have something to lose if they behave badly at a professional event, etc.)