Wow, this is subtlety if I have ever seen it. If you are going to implicate someone as someone else, just come out and say it, and present your evidence. What does having someone's "card marked" mean? Sounds terribly threatening. I had a look over the list of members that came up on a search of STR and there are plenty. How, uh, "brave" of you to implicate all of them.
Every forum has trolls and many of them are banned members. Just the other day Satan666_HailHitler joined, spread some rather explicit text regarding inappropriate behavior with animals, was liked by another Satan supporter who posted some inappropriate content. I have no idea who these persons are, but I wouldn't be surprised if they were former members who had a beef with the forum.
The OP seems a little eccentric, but your imagination doesn't qualify as any sort of evidence. You wouldn't be trying to impress some chic with this cowboy post, would you?