Who, me? It's another Monday, dear readers, which means the work week has begun anew. On the bright side, it also means another dose of the reader-submitted IT hack stories we call Who, Me?

This week our hero – if we can call him that – is a prankster who we'll regomise as "Mark" who once worked for a large corporation in the kind of busy office you see in movies where everyone is always busy do business of any kind.

This was in the early days of social media. Facebook was a fairly new thing and few companies had yet developed policies on whether it was appropriate to use it during work hours. Mark had a colleague – let's call him "Dave" – who was quite taken with the old Facebook, and the eerie blue glow of The Social Network could often be seen radiating from his locker.

This wasn't really a problem, as Dave always seemed to get his work done and done well. Nonetheless, it was "a bit of a running joke" as Mark puts it.