If the objective is to check whether anyone's hiding an AR-15 in their hotel room, presumably you have to check under the bed and in the closet and in the bathroom, which a fixed camera couldn't do.
Also I think the average hotel guest is completely fine with maids entering during the day when the room's unoccupied, but would not appreciate a camera in the bedroom, with or without a big sign and a big red light.
Also I think the average hotel guest is completely fine with maids entering during the day when the room's unoccupied, but would not appreciate a camera in the bedroom, with or without a big sign and a big red light.