You're really oversimplifying here. Something tells me this highschooler doesn't personally own the breadth of commercial equipment that he hacked for this prank.
> And no worker should ever have to do any work (such as reset a computer system) because of your prank. Workers have enough work to do and enough hassles in their lives.
Okay, let's all be worker robots :)
So they shouldn't have done it.
> Okay, let's all be worker robots :)
It's not about what you want to do. It's about what some low-paid worker who has to clean up after you thinks. Or some other student inconvenienced by your prank thinks.
If you're impacting on someone else's life then you're in the wrong!
What if these people don't want your sense of humour imposed on them?
I think it's ethically wrong.