Evil hotel clock
The damned clock shows the wrong time. I tried to adjust it, and it started playing music that I couldn't shut off for 30 minutes. I can't work out how it works. Pulling out the power supply doesn't stop it - it still operates! (Hence, evil).
It also has the wrong time on it by an hour and WILL NOT let me adjust it :-(
Last night, in fear of it blaring music at random, I stuck it in the bathtub. The chambermaid put it back. Tonight it's outside on the balcony and hopefully it'll either be removed or will stay there.