That's sad, but it's happened to me a few times over the years.
Back when I lived in Albuquerque we were hired to play a country-western dance for a rodeo. They had a nice dinner set up in the hotel for the participants, and because of scheduling we had to set up while they were having their dinner.
No problem, we loaded in as quietly as we could, hooked everything up, then everyone quickly played ONE note on their instruments/mics to make sure everything was hooked up properly.
Well, the one guy was just LOOKING for something to bitch about, he came running up and yelled, "We're EATING!!! Why are you playing now!!!??!?!?" The gentleman running the dinner took him aside and explained that because of the scheduling we had to set up during the dinner, but he kept grousing loud enough for everyone to hear (and causing much more of a disturbance than we did.
Well, he had one of those "Hello, my name is: Mr. Butt-Head" nametags on. After we set up and retired to the lobby until the dance was to start, I walked up to the front desk and said, "Hello, we've got a long drive back tomorrow morning, could I please get a wakeup call at 3:30?" "Why certainly, may I see your room key?" I reached in my pocket, and said, "Oh, my wife has the key, hang on just a minute" and started to walk towards the hall. "Never mind sir, what's your name?"
"Mr. Butthead. Thank you very much!"
The guys in the band did an admirable job of suppressing the snickers...