One thing that the bot is missing (just my opinion, obviously) is a pseudonymous identifier. I realize this technically does not make it anonymous anymore, but I don't think it matters.

For example, if you post anonymous feedback saying "the toilets should be cleaned more regularly" and you then post an anonymous comment to that post saying "I agree", there's no way of knowing if consensus is building or if someone is astroturfing the discussion.

Compare this to if the feedback is posted by anonymous#f46d and the reply is posted by anonymous#6c7e, at least you know it's different people making the posts.