A sock has no surficial traits. You make it sound like all socks are alike. Recognizing some socks doesn't mean you'll recognize all, and having been impersonated by one does not increase your ability to tell a sock apart from a non-sock.
And Eclipse wouldn't have even if she was. If Hunter had kept his head under the radar and not attracted unnecessary attention to himself from the moderators, he wouldn't have been banned. Then Eclipse jumped up in front of the moderator radar with Hunter's IP in her records. Of course she gets banned, since the moderators are hot on Hunter's tail.
Since the two were a couple, the two shared IP adress a lot I bet. It's not until Eclipse got visible in the Hunter drama that moderators cared to check her up. Had she kept quiet on the matter, she probably wouldn't have been banned. If Hunter hadn't gotten banned, she probably never would have either.