The bathroom is the only place that's not covered by either audio or video surveillance. So it's possible that this could be abused - messages or advice on moves could somehow be relayed to someone wishing to exploit the situation. The top-level chess world is traditionally full of paranoia, suspicion and allegation.
It does sound silly at first, but he is going to the toilet a
lot, I suppose.
The whole saga can be followed
here and also on news services.
Some would ridicule this as nothing more than the machinations of the unpopular Mr. Danailov, Topalov's manager, but maybe there is an issue here that needs to be fully addressed?
Anyway, Topalov won a game today, playing black.