When you choose a username in certain places — like Minecraft, for example — it’s expected that you abide by certain decency rules. No crude or offensive names and such. Many people don’t listen to such rules, of course, and so there are also word filters into place to weed out many of them. Humans are a creative lot though and so word filters can only do so much; many times offensive and crude names squeak through and enter into the wild, living on until spotted or tattled on. Such was the case with one Minecraft player who spent years playing with a particular crude name before getting hit with a light-hearted jab from Mojang itself.