Agreed Stephen. I taped Lynyrd Skynyrd this summer and had tons of clappers around me. I didn't feel its was worth trading, so its in storage.
As for singing along while stealthing: I don't recommend it. Take the Ashlee Simpson approach. As for dancing around: anything can come loose. My self, I'm a swayer at most shows. The technique offered no problems with my stealth recordings. Even moving away slowly from wookies on the floor, didn't ruin my recording. But sudden, gregarious moves might. Besides, after going to over 150 shows lifetime, my cartilage in my knees are spent. So, dancing is ruled out even if I wasn't taping.
Never bust on anyone for having a good time when your stealthing. If you think they are cool, work out a deal with everyone in your seating area prior to the show. Offer them a copy of the show. And don't stiff them. Our reputation is important in the non-taper community. Even if some of them can be dicks.
Most of all, have fun. Being a human-Bogen stand can be tough on the body, but enjoying the show, not just working it, should always be the perogative. Hope that helps.