Do you want to show only posts that are created through peerquery?
Maybe it will help to create a custom json for that - dmania does that. However, this can still be gamed through creating Posts via code.
But this on the other hand could be solved by adding some kind of encrypted text which proofs that the post was indeed created through peerquery.
oh yeah, actually this is only the alpha. actually the beta version might include a database indexing system to index posts created from peerquery.com
that way our future upvote vote(concept borrowed from the Utopian bot) could upvote posts created through peer query