Re: Oh, the joys
Whilst at Uni, someone discovered Net Send and started sending messages to random machine names (as each of the rooms had a naming theme, it wasn't difficulty, IIRC the room I was in had each machine names as an Element). Anyway, he sent some dumb message to the machine I was on. I politely replied, asking him to kindly refrain from messaging people in general, and my elf in particular. He decided to refuse, and started repeatedly sending my computer messages. After ignoring another request to refrain, I knocked together a quick loop script which sent him 20k messages. Each of which required clicking through, and would steal focus.
He didn't net send again. I guess you could say he got the message(s).