I am not sure why you gave it negative trust though.
His petty and pathetic attempt to 'troll' of course. He just tags anyone he doesn't like the look of as an alt of someone or another. Apparently he thinks nubbins and fluffypony are alts on Badbear and nubbins and fluffypony are alts of mine so that must mean BadBear is my alt too. I think he's just having trouble keeping track of all his nonsense.