I don't believe that scum would fake claim DP seriously at this point. It would make a good fake claim if they were in danger of being lynched, but at this point in the game you're just putting yourself on a time limit with a gambit like that. And in any case, TWE didn't do this, he backed down on the comment.
A scenario I did consider was scum claiming it to try to bait reactions/counterclaims and then playing it off as a joke, but again I'm not sure how realistic a plan that would be, and it's more me trying to fit a scum motive to the claim.
I was expecting TWE to come back and say that it was a joke, and his posts line up with the excuse he did give. But on the other hand, I can't see skimming the first half of that page and not thinking that the game had started, I mean, there's a vote which is quoted multiple times.
Plus as Darryl said by that point he would have known his role PM, so regardless of whether the game had started or not, any comments would still be informed by that.
Summary of thoughts: I can't think of a good scum motive for it as a gambit. Mixed on how plausible the excuse is, but slightly leaning towards it being true. None of this is indicative of actual alignment.