I think we need clarification from X himself on this issue before we can solidify who is right and wrong in this situation.Xyzzy's entire plan revolves around sharing those scum lists. Its based on the idea that if someone gets recruited their suspicions will be greatly different from their previous scumlists.
Attacking someone for misrepresenting someones argument while you don't have a clear idea of what the argument is, is a logical fallacy.
I see what you're saying and it's a possibility. However, the way I read his post was that he thought we should decide who we think is scummy and if opinions change greatly as days go by, it's notable and potentially a scumtell.
As I said, I think X needs a chance to clarify and defend his position.