The only thing you have to do to make comments worthwhile is restrict them to actual academics. Even if they went on to post shit, it would only destroy their own reputation.
This destroys one of the potential benefits of comments -- which is to open up what might be closed communities. Academic disciplines can at times turn into echo chambers.
But there is the rub: if you make comments open, then you will will probably be flooded with. If you close them up, then fail to get the benefits of openness.
But there is the rub: if you make comments open, then you will will probably be flooded with. If you close them up, then fail to get the benefits of openness.