Consider a lonely teenager whose internet friend one day stops replying so they go and make their own friend, and then maybe after "taking advice" from this friend goes to school with a gun?
Maybe not terribly likely events, but I think a certain element of risk must be managed (maybe limit session durations so you can't fool yourself into thinking its for real as easily).
Roher however, has pretty clear views that he won't manage any risk, because what he's doing is art and then there's no place for safety.