Yeah, just don't do any debates regarding things that have... colorful fanbases... Like Oldschool vidya or Star Wars/Trek. Or anything from people's childhoods. People can get very attached to those things that they grew up on, and there's nothing worse than two people deciding that what they're angry about is more important than the comfort of everyone else in a panel. But, there's nothing better than a good-natured debate between two respectful parties. I'd probably go to a debate, if only because I love to watch people squirm when they screw up during their argument.