I agree that parallels to the stupid rules imposed on office environments due to the threat of litigation are relevant. It might be the case that hotels, especially in U.S., have changed certain housekeeping-related processes and procedures. If another DSK incident happens at the same hotel, the aggrieved housekeeper would surely (and probably successfully) sue, accusing the hotel of negligently ignoring a well-understood risk to her safety.

Can anyone from the industry discuss? For example, I recall that in the U.S., housekeeping usually keeps the door to the room open while working. Maybe a change would be to lock and dead-bolt the door, though if the registered guest (e.g., DSK in that case) returned to his room, it would be difficult for housekeeping to deny him access. But you could think of ways to mitigate the risk, e.g., calling someone downstairs or pressing a button on a pager on her belt to notify the front desk that the guest is returning to the room while she is in there. I wouldn't be surprised to see processes like this in the future.

I haven't noticed any changes yet, FWIW.