I think there are places to have discussions and places not to have them.
I can't imagine why, for example, CBS affiliate's would have comment sections on their news articles. What is the point? I don't understand why the NYT or Washington Post would, either. That isn't to say the content is not worth discussing, but why does it have to be *there*? And why does it have to be directly on the same page as the actual article? It detracts from the content and refocuses it to anything *but* the content.
I am put off by "use your real identity", but I have no problem with "fuck it, we're not having comments at all, then". In fact, when your site (Yahoo!, CBS, etc) is almost nothing but "Durr durr, republithugs and libtards durr durr durr!" or "this news article involves a non-white person, therefore they are all monkeys and should be kicked out of the country and let the race wars begin you guys! also, fuck all the atheists and non-Christians and you too whatever political affiliation you have that is not mine!" . . . . then it's probably the best decision you can ever make.