Heh. I used to leave my bag in one of those closets when I went to the bathroom if I was in a computer lab.
I think about security, so I know what you're talking about... but there is a real line between security and fearmongering.
It's just network access, or denial of service. Nothing more.
Then again at the time we had the IRA bombing London and we were told specific bomb threats against the uni from idiots every few months or so.