Very dangerous thing you're proposing here.
Libel laws exist on the web just as much as they do elsewhere and with this increasingly litigious society I feel you are taking a huge risk.
As the law stands, it is the publisher of any comments (good or bad) who is legally responsible for what those comments say, not the originator of the article. So I can see a situation where someone with a personal grudge against you, the publisher, might send some very libellous text resulting in you ending up in court carrying the can.
I would keep well away if I were in your situation.
But, as in all things legal, get WRITTEN professional advice before embarking on this.