Are YFM retarded enough not to insure their equipment against accidental damage? If their rules allow sealed water bottles in the studio and an accident occurs, surely they can have no complaints - it's just that, an accident. If they had expressly forbade any drinks in the studio and an accident occurred, then they'd have the right to be annoyed.
There must be a hidden agenda at work here. Whatever happened, it reflects very badly on YFM.