Check the article link below for more details on how authentic identity is conducive to constructive comment-based collaboration
The logic is simple. If online posters are tied to their real life identities, they will be more responsible with their comments.
So far more than 300,000 sites have decided to take them up on the offer, and the majority of publishers report an increase in the quality of comments. (In general, sites that offer Facebook comments report a decrease in the raw numbers but an increase in the quality.)