I'm going to smack him round the head!
My 15 yr old ds is very computer savvy, with a strange sense of humour. One day last month, I came downstairs in the morning ready to go to work, logged into pooter, went into emails, and a complete stream of gibberish came out when I typed - more so than usual - just complete letter strings.
I carefully looked at my keyboard, tapped the relevant letters, and still gibberish. I honestly thought for a second I'd had a kind of weird cerebral event overnight- like a keyboard expressive dysphasia. then I realised the scrote had unpicked my letter keys and moved them around.
Tonight, I go on the pooter, to find the stuff on my screen upside down - it turns out if you unpick the control key, and fiddle with it - you can do that. After some shouting, all was righted - am not standing on my head to write this after-all.
He is a lovely lad - well behaved, funny, bright, and up for a laugh! How can I get my own back? Summat funny but not humiliating or expensive? :)