Board Thread:General Discussion/@comment-25050575-20140611163348/@comment-6604690-20140618005411

We can just think its possible that they'll find a solution to that. If the heat had been a problem, they'd sort it out before they release it all in public.

(Besides, if it had been a problem, every player that played in SAO would have not lasted for 2 years; their heads would have been fried even when they're not yet killed in-game. Kirito would have known that kind of information)