The worst thing you did on someone elses computer

I wrote a program to create a hidden process that would loop the mosquito sound endlessly even after the computer restarts.
...Good times.. good times.. (I put it on the department store computers too! i loved watching little kids walking outa the store clutching their ears. ;D)

 

Who goes to MySpace anymore? Isn't it full of crap/viruses?

 

Oh lol. I used to change the keyboard input of my school computers to Japanese.

 

When I was young I 'accidentally' deleted something which made the computer not work. Windows 98 at the latest. How I want to change the keyboard to Japense

 

well, some idiot left both his email and his facebook account logged-in. i messaged him that he was a dumbass with his own accounts.

 

LOL, that happened once when at an Apple Store. Some guy was logged on on an iPhone. LOL, I did some messed up stuff there!

 

explain

 

I started off by saying weird things on the board. Then deleted contacts/sended spam of some sort...

 

Wow, you guys are cruel. Remind me to never to tell any of you my email addresses ever.

 

I have acces to it in Anime-Forums since I'm GM there hahahahaha
Just Kiding my "friend".

 

I made a hacksaw and left it in my Java programming class, got 6-7 peoples personal email accounts, got the teachers personal info/passwords, changed my grades in the teachers grade book, and i got my hacksaw back the next day

 

lol I put a porn site as thier home page on my cousin computer

 

ok I put a loud scream as the new startup sound for my brother's computer then set his background to the exorcist ghost. raised the volume to max then put a hidden camera on the top shelf behind him. started recording when he came into his computer room and the minute he logged on into his account, BLAM! lol face was priceless
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oh and I took a pic of a bluescreen on the internet then opened up the pic in photo viewer then set the pic in fullscreen. edited the pic so it said "SYSTEM32.DLL could not be something something".

 

That's what I do.

I put a file onto my friends laptop so that everytime he started it up, it would come up with several documents that mentioned "The Game" because he hates it so much.

Then I made a 2 line CMD window that kept duplicating itself, everytime one is closed it was re-opened. that was an awesome gamer night. Lucky for me, he knows nothing about computers.

 

Whoa (*_*)..This is crazy..

 

I once made a script that would open the cd-tray and when someone's closes it, it would re-open itself.
Might sound silly, but if the complete network at our school is infected with it, the laugh is huge.

 

Smart lion is smart.

 

I remember when I went to a College to see a teacher for some reason, all of the PCs connected to their network will be infected where the CD/DVD tray would open and close and you would constantly hear a beeping sound. It wasn't me! They eventually found out what the problem was.

 

Downloaded gay porn on my friends computer and changed the names to those of movies like Bad Boys and The wrestler. +1 point if you know why I gave them those names...
Many good times were had.