My first was when I was arguing with the IT guy about local shells on their big iron at Uni. I told him it was a risk to let dumbasses like us have a shell on

My first was when I was arguing with the IT guy about local shells on their big iron at Uni. I told him it was a risk to let dumbasses like us have a shell on his server. He said we couldn't do anything, that they were unprivileged accounts. "Watch this", says I, as his machine froze. I got in so much trouble for that. I hope you can't do that kind of thing any more.