It's so damn funny. XD If you haven't heard by now, it's on tumblr.
Here's the link for it. tf2shitfest.tumblr.com/post/64…
But of course Sniper's name is not official because valve hasn't claim that Sniper's real name is "Mick Mundy". This also happen to Medic as well. (maybe the others as well?)
But unlike Medic, I (and tf2Fandom) find his name too cute and too hilarious to forget. XD
Poor Sniper. :[