The internet has no shortage of pathetic edgelords who think they are far smarter and funnier than they really are. I mostly just ignore them, no point in giving them the satisfaction of having their existence acknowledged.
I'm not sure if Fu11er and Hitter can only be read in the way you do it. In l337-speak 1 is normally l, so it can be a guy with the name Fuller, and Hitter may be derived from the verb to hit. Normal gamer speak, Trunda is a hard hitter.
As Skadi said, Fu11er is a guy named Fuller, Hitter is a gaming term and Ausweize is apparently german for ID card. Also, there is no one named Hitter or Ausweize in SB-1. Please stop trying to slander people.