I worked for about 30 yrs in IT support & I'm here to tell you it's all true!

We use to "borrow" a very large and heavy TV from the training dept. to watch stuff on night shift. Naturally somebody dropped it down the stairs.

A poor guy (without cash) rang up in extremis just before Christmas to report his ATM card eaten. I tried to calm him down while the rest of the shift fell about laughing, the bastards.

Somebody thought there was an intruder and rang the police. They released a dog which charged down the corridor, unfortunately only finding one of the shift leaving the toilet - bit his bum.

And you really do tell folks to turn their equipment off then on again!