This has arisen from a chat I had with some friends regarding 'dial-gate'. These guys don't play X-wing (yet) but they asked a very pertinent question 'if he was thinking about cheating, why not ask to not stream the game?'
Cheating aside, there are quite a few valid reasons somebody wouldn't want a game to be streamed or recorded. As I've never been to a large tournament, I'm curious: do players have a say in this? Can they refuse?