As others have said, the hotel doesn't have any authority over the spectrum itself so it can't impose any rules on it. Take the ham operator scenario: One oper

As others have said, the hotel doesn't have any authority over the spectrum itself so it can't impose any rules on it. Take the ham operator scenario: One operator can't broadcast a continuous whistle so that nobody else can talk. It's impossible for an operator to obtain consent to do this. A hotel acting as an operator can't do it even if they got permission from every guest because the guests don't have any authority to grant it. It's simply prohibited for any operator to behave that way, full stop. There are a couple of things a hotel could do though: 1) Kick anyone using wifi in a way they don't like off the property. 2) Encase the exhibition area in a giant Faraday cage so that nobody's cell phone works. Their APs are the only ones with internet access so no point for anyone else to turn one on. I don't think either option would end well for any business that tried it. The reason they like the deauth method is because they can lock out competitors without the non-technical public realizing what's going on.