Concerning photographs, it would be easier if they were generally limited to some kind of "official photographers" & group photographs during those events. I'm new to Wikimedia events, and only attended two, last WMCON in Berlin and Big Fat Brussels. In Brussels we were asked to not photograph the participants unless it was explicitly allowed (such as in group photographs), which I found quite reasonable - and, frankly, it was a relief.
As for touching, I'm a bit shy myself, and feel somewhat uneasy when someone hugs or touches me, but I would never ask someone to not do what generally is a genuine proof of
affection & friendship, let alone denounce that person. When it's too close that it becomes embarassing, one can just ask the other to stay a bit farther. We just need to ask, to communicate - it doesn't seem that hard, that difficult. And doesn't seem at all the kind of thing that would grant a report to the Safety team, and even less some kind of reaction from them.
All the best,
Paulo