Real identities would require verification, which sites like FB only do after the fact.
I fear that a huge repercussion of the election issues is that we will get there. A real ID may be required for you to post comments in all websites. And i'm not sure how I feel about that. Reality is that it would drastically reduce comment trolling, if your real identify was viewable and searchable by all you know. But at what cost?
I really do wonder what is the root of trolling. What makes a "normal" person take an alter-ego/view/counter view, solely based on lack of face to face interaction...