ZeesKite,
Please, let it rest. You are generating much more disruption with this issue than Jothar is.
As far as a phone-call verified screen name, I personally don’t think that it would be feasible. In general, security and usability are inversely proportional, so a proper balance needs to be attained. Also, I feel that providing personal information such as a phone number to a Web site is in itself a security threat for the user.
I think the best path for greater security lies in the existing features of the CR: the posters and moderators. Posters should guard their personal information more closely, and moderators should be on the lookout to edit/delete posts that may compromise someone’s personal information, especially if the poster is young.