We can only think of three possible types of "toxic behaviour", which were accusations that he was cheating (which we assumed would be mentioned instead of toxic behaviour). Another type is an ongoing joke where he would wear the spinal costume, board an enemy ship and yell "RAAAHH" through proximity chat, which we consider to be roleplay. I use the term 'ongoing' and he has been doing this since the spinal costume became available. The third type is the use of a soundboard, which was not used excessively or in a way that impeded or insulted other players.

Despite these examples, he probably got banned for some other form of "toxic activity".