"This polish hotel's picture on trivago vs in real life"
"A few years ago I was staying at a hotel on the Las Vegas strip and they had construction going on. Construction-related faulty wiring or something kept causing the alarm to go off (false alarm) and periodically a recorded voice would say there was some kind of incident, and to stay in your room until otherwise notified. All. Night. Long."
They're actually taking steps against it though by posting this stuff online.
Central Europe the same
You are correct. I usually put a business card in it to keep the power on.