I won't win this one, too late... and too crap
But back in 1988/1989 I worked in mainframe systems. We used something called Roscoe as a text/data editor, and I discovered that you could message friends across the company.

Then there was a move, and it was clear that my boss wanted to move me in such a way as to keep a closer eye on what I was doing (I was poorly motivated, unsupported and understretched) so I messaged friends to say "my bastard boss is moving me."

I didn't quite appreciate that as well as being a bastard (he truly was - his initials were SS and he liked to sign them like the famous Nazis... who he appeared to broadly sympathise with) he was also actually quite intelligent.

The next day he asked me into a room and showed me a huge printout. There, carefully highlighted, was every bad thing I'd said about him over the past six months.

To his credit, he didn't get me fired or tell any senior managers. But to an awkward, shy and confused teenager it was the end of my IT honeymoon.
(clopinettes, Wed 30 Jan 2008, 12:18, 1 reply)

I, too, found this out the hard way
Not realising that my attempts to chat up one of my colleagues was being routed through the mainframe's central console.

How we laughed

*click*
( Scaryduck LIKES EGG, Wed 30 Jan 2008, 12:42, closed)