> I could, I suppose, ask each person that I see with a camera “would you mind not including me in anything you upload, please?”. And, since everyone with whom I’ve spoken at games, so far anyway, has been perfectly pleasant and friendly, I’d be hopeful that they would at least consider my request. I have not done this.
I've done this several times in various contexts. If you ask in a nice way, it usually works
If you don't ask, it's very unlikely people will have the telepathy needed to understand what you quietly want
For air-soft specifically it is also very feasible to wear a full face mask and become very hard for regular people to recognise.