Currently downvotes are enabled on a trial basis, this was done by me to see if they can be enabled to prevent spam
There's a bunch of spam from a user called "BravoIsabella" that has positive upvotes, and a grumpy post from one of the AI communities saying "mystery downvoter show yourself".
Edit: we have three regular posters (Radovic, LVL3_Eroticism, and Cleverhans) saying they don't like the decision and they may stop posting. There's at least one instance of upvoted spam.
There are two instances of spam accounts getting upvotes