What's the most fun (evil) pc trick you've played on someone??

My dad didnt know about the messenger service built into windows so i used it and told him i was going to eat his heart and stuff like that. Then i went outside his computer room and made some scratching noises and then jumped out and threw a roll of paper towels at him. I found it humorous, he just thought i was on drugs.
 
Hope you didn't give him a heart attack windowsmonopoly!!!!!!!:)

Another one i did to my dad, although it was to teach him a lesson rather than a "trick" was - he used to leave all my cd's lying around, out of their cases, getting scratched up. I had a creative labs x4 cdrom (this was a long time ago). It came with some cool dos prompt commands that allowed me to lock and unlock the tray. Every time he left a cd out of its case i would lock the tray so that he couldn't use the cdrom drive. he never figured out the dos commands (for which i had created batch files so typing open or close in dos would do it) and did eventually learn to put my cd's away properly.
 
My step daughter and I had a friendly computer practical joke war going on. On one occaision I changed her Windows language to Mandarin (not a strong suit for a New Zealander ;)

To retaliate, she enrolled me in a host of dating sites as a wealthy single doctor looking for a mail order bride! (I don't use that email site any more).
 
Hahah,

I think every experienced computer user can relate to these things,

Some things I have done:

I took a screenshots of my mates word document then set it as his wallpaper

I have put all his documents in a folder and hidden the folder

I have edited the clippy thing to say really rude and insulting things

I have used a fake virus to trick our network administrator, he freaked out and nearly reformatted the whole network haha

I have put a moustrap on the leaver of my mates desk chair (one of my eviler ones)

I changed our network administrators background to a half naked guy (admin is male) - Was especially funny when he had to do a presentation on projector in front of whole school

Turned the monitor of one of my computer illiterate mates upside down

I edited a picture of a mates mum to show a lesbian pic (and set it as his background)

Uhm, I think thats about it. Will post if I think of some more,

Take care everyone.

cheers,

Korrupt
 
well while mine are usually more physical and involving the jacking up cars of or annoying the ever loving begeebers out of friends and well-wishers i have afew good ones like this such as.

while my computer app teacher was out of the room i switched the keyboard wires of my computer and the unsuspecting soul across from me (were arranged in collumns facing each other) and when he came back (i feel no remorse for this because he's a jerk anywway) as he began to type on his keyboard i typed back things like "hey don't touch me" and "who gave you the right to decide waht i do!" hilarity ensued mostly because he isn't the sharpest tool in the shed and believed the computer actually was talking to him.
 
I love using admin power in Counterstrike to change people's left click from "fire" to "say I'm a noob" Funniest thing ever when they jump out in front of you, and all they do is spam the chat XD
 
I had some friends play a trick on me that backfired. Its not exactly pc related but is still quite funny.
We had an Xbox gaming session and were playing forza, i had to pop out to get a bottle of coke, while i was gone they turned all the driver aids off so that i was in simulation mode but they weren't, i still won. I'm very good at driving games in general.
 
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