If yes, then think about more than 70% of not native english speakers, which don´t. Even if they can follow a presentation or a panel. And you mean, they should be punished for that?
I don't quite see the connection to what Jan said here. Nobody wants to punish non native speakers. Is there a correlation between being a non-native speaker and not wanting to be filmed? I have to agree with jan that submissions that decline being video taped _should_ indeed be punished (to pick up on that hyperbole). The reason is simple. These contributors are providing less value by not being taped. They are effectively "punishing" people that are unable to attend the conference physically. We wouldn't be getting as much out of their talks as we possibly could. Daniel