A work / pc trick I played a few years ago was sitting at my bosses desk in an open plan office while he was out and messing with autocorrect on his pc.
Everyone in the office chipped in with suggestions; the was always teh, it was ti, and loads of technical stuff was corrupted often bizarrely illogically. Road was always raod, drain was always drian. Some were bonkers, "park" became "major development opportunity" "Swimming pool" was always changed to "leisure centre", "staff" always changed to "slaves", "members of the public" became "knights of the realm"
"committee" became "fairies"
We were playing this for an hour or more.
He came back and started typing one fingered and as he typed and looked at the screen he started making little puzzled exclamations.
One by one my colleagues had to leave as they were unable to suppress their giggles and rising hysteria, till there were me, my boss and the girl who sat facing me but with her back to my boss. She had tears running down her face.
Eventually he called IT, and they said it must have been hacked, but even then they never let on how to fix it.
We all trooped back in and I offered to put it right. Trouble was we couldn't remember all the words we had changed. Not that we tried that hard.
Months later he was still finding new surprises sometimes so subtle they got into documents.
Neither me nor IT ever mentioned the "restore default setting" option.