Re: Jammers ???
Although technically, sending de-authentication packets isn't jamming, it has the same effect, that is preventing devices from communicating with each other. Note that the hotel isn't using these devices to manage it's own network equipment, but those of it's customers. Therefore they are interfering with the proper operation of other people's communications services, which has to be against some law.
It's not as if the Ts&Cs of the hotel residency explicitly authorise the hotel to do this, is it?