Small thing, but I always found the dog biscuit anecdote oddly...chilling? That's too strong a word, but it's in that neighbourhood. More than a few kids probably nibbled on dog treats in their lives but walking down the hallway at school with a box of them doesn't seem sad in the way it otherwise might. I always thought there was something aggressive about it. An aggressive strangeness that was designed to make people feel uncomfortable, or at least offered that as a pleasant bonus.
His odd behaviours remind me of Russell Williams