It's not so much about the icons, but about permissions. It doesn't really hurt they are there, for whichever use they want to give to them (maybe in the future). Resellers could have their own section, as an example. It's the same with the "Polymorphic Sheep" group. Who knows why one forum member would use it instead of other Groups? But there it is, and probably they know why they want it.
My apologies to Chocholo, as he would probable like this topic clean.