He didn't want to post about it and is too shy to make an account, plus since it's me friend, I'll bring him teh justice.
Teh Wulf (The "useless" pyro) STEAM_0:0:67415400
Noir Lime STEAM_0:1:56197605
Based on my friends recollection, in manncohq, they went to the top of the white building and hid inside that ac vent, doing nothing and playing friendly. After warning them to stop they just continued and Teh Wulf added the useless remark into his name. They did this for the duration of the map he said, or were just idiots wasting time eating free crits :V
There was a third but he didn't go full useless...
Pictures added are from different rounds.