Hmmmm not a bad idea, though that would put some friction in the interactive nature of it, which is really important to us. We haven't had a lot of problems with people showing passwords etc so far as people either 1. have two screens or 2. just use window capture to avoid showing something they don't want to.
window capture sounds like a pretty good suggestion for the time being. It'll at least mitigate what can be revealed. It wouldn't work for everything but there's definitely a balance to be found I bet. The delay is essentially how traditional broadcasters manage it (with a shorter delay since there's someone monitoring it separately) so it might still work out for this.
