Actually, I was the one who started the "Sir (Or should I say Sir Derp)" Obsession. Once, SDO become King of the Premium, a guy took Sir Derp Boruto (Boruto Uzumaki). So, for the lolz, I asked a few people to put Sir Derp "Insert Naruto Character here" usernames. The sirs were Sasuke (Radon), Itachi and Sakura (Solidus), Minato (Immortal), Madara (Demonic), Naruto, Kakashi and Ashura.
So, eventually, there were many Sir Derps around the base. You would have noticed that if you paid attention to the online list of April. Lol It faded out eventually though as people wanted to get their original names back.
Also, yes; SDO did change his name to Saint Derp Obito but he came back and changed it to Sir Derp Obito :
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It's just a name that we took, it's not a big deal unless you take it seriously.