Today I had like 45min and was on someones computer, and because they didn't have the internet I decided that I would make a message for them. So next time they start their computer it would pop up. So I created a batch file and it was called "Delete Me!.bat" and it went something like this.

Code:
@echo off
msg "Users Name" /Time:* "What's up?"
msg "Users Name" /Time:* "I see your computer is started."
msg "Users Name" /Time:* "Mission today."
msg "Users Name" /Time:* "Delete Everything!!!"

call C:\docume~*\username\desktop\otherbatch.bat
In the other batch file (otherbatch.bat) I think I put...
Code:
 
@echo off 
cmd
echo "Deleting Drive C: Contents..."
I'm not sure if thats how I had it or not but it's basic batch stuff. When it ran it created a loop and just kept displaying these pop ups every * seconds. The funny thing is there was nothing in the task list to end, there is no command prompt to exit out of or stop the batch from running. So it continues on and on even if you log off you still get the messages. It pissed me off and I was just messing around. If you were to do this and stick the batches in hidden folder and tell the registry or startup folder to start them it would be hard to find and stop. An average user would have to clue.

I figure many other people have things to post that they have made or done at some point that they could also post here.