Have you considered creating a sub-forum...

[K9Buck]

...wherein everybody can read, but only those selected can respond? Such a forum could be reserved for the better posters who actually answer questions directed at them and who engage in honest discussion. It might encourage posters to be "better" rather than engaging in idiotic trolling and hit-and-run posts where they make a claim and then disappear once they're proven wrong. Just a thought. Thanks.