I always lock my room's deadbolt and use the security latch/hasp thing. Especially when there's no Do Not Disturb sign (as was the case last night), I'll often experience housekeeping knock (that shrill knock using a room key card...one of my least favorite sounds ever) on my door in the morning, and if I'm not quick to answer or don't shout back loud enough, the door will open (thankfully, the security latch usually keeps them from barging in). This happens even though I've locked the deadbolt and a regular room key card shouldn't even unlock the door.

I understand management having a key that overrides the deadbolt (for safety reasons or do deal with overstaying guests), or housekeeping using one after the posted checkout time. But I seem to regularly have hotel housekeepers try to open the door well before posted checkout (like this morning, when due to a missing DND sign, I got woken up at 8am by a housekeeper loudly rapping on my door and then the door opening). It seems rational to me that if a housekeeper were to try their keycard and it didn't work then the logical assumption would be that the room is occupied and deadbolted, and it seems like a safety issue to me that a hotel should not issue its housekeepers master keys that can override deadbolts. Yet I've had this happen at all manner of chains (from budget Choice/Wyndham brands up to Marriotts and IHG properties). As someone who often travels and checks in late and sleeps in, I can also tell you it's not isolated or even a particularly rare occurrence, either.

Why is this a thing??