I half-agree on 1. That is it'd be nice if people could supply a more descriptive name (potentially their "real" one) and have it shown with their username, if they wish. I don't think it should be required - doubt such a policy is workable, never mind about desirable.
I disagree with Nix below that "real" names don't matter. A "real" name can definitely make it easier to recognise people.
+1 on 2 and 3.
0 to -1 on 4. I don't think there's any point having LWN waste energy formulating policies. I don't think there's any point in anything beyond guidelines like:
"Try add value with your comments. Try be polite, especially in the face of disagreement or perceived insults."
Completely disagree on 5, except to the extent required by court orders (or other similarly hard-to-not-comply-with orders).