You're a burglar, but....

[Craig the cyclist]

I worked with a guy who was from an Italian family so spoke fluent Italian. He used to change the language on anyone who's phone he got his hands on. Someone did his to Russian.
The last school I worked at had printer/photocopiers that were for both staff and students. Some little f*****r child, changed the one in our department to Polish. Took us weeks to get it back to English.

We used to play a similar game at work, if you left your phone unlocked then we would change the names on the address list.

We had a manager who was a keen golfer, she used to wear trousers by Hippo, which had a little hippo tag on one of the belt loops. Someone changed her name to 'Hippo' on one of our colleagues phone, who answered 'Hippo?' when the manager went, she was really cross about it!