Reader feedback mechanism
By "URL" I assume Ravpapa means "IP"? If so, that data is highly confidential unless the editor is anonymous. Only certain situations justify collecting IP addresess, eg sockputtetry. Anyway, many users have dynamic IP addresses: they can just log out and log back in with a new number... This is often problem for sockpuppet investigations, in fact, though comparitive analysis can often resolve this issue.
Astroturfing is a problem in all "rate this" or "comment on that" discussions: it is par for the course, unfortunately. Openness and accountability would certainly help but we need to be clear from the off that meats and socks—as well as votestacking, forum-shopping, and other false consensus-building techniques described in [1]—are looked upon with extreme disapproval.