I mean, your claim is super convenient for say a serial killer (or a mafia member bit wanting to get shot by one).
I still don't view it as scummy, because it also makes you a great settling lynch if we can't find anything better in our 8 days.
This is definitely a fake (or real) claim I make as scum. I point to myself in the last RMM game, Dr. Who, where I was an enabler and claimed right off the bat. I was scum there, and had a good reason to claim.
I think you'd have a harder time figuring out a compelling scum narrative for a scum-held misdirection role to claim right off the bat. A straight up fake claim? Sure, I guess. As an SK maybe, to try to survive as long as possible.
I see it this way -- 9-player games are hard to both 1) make last and 2) make balanced, when there are a lot of roles. Either the two scum are too strong (and you can't really have more than 2 scum) or the three scum are too weak (because 6 v 3 is just crazy, so you can't really have more than 2 scum). So maybe yuma includes an SK, so it's 2 + 1 scum vs. 6 town. But probably it's 2 v 7.
If town has strong roles, and I mean simple strong like cop/doc, with such a small pool to choose from, the likelihood of catching scum goes up, and that's just tough. How to diffuse that? Misdirection. So, I expect scum has a bus driver or something similar, possibly ninja. SK would need to be BP, maybe investigation-proof.
But RMM is about roles, so town needs roles. If there are cop/tracker/watcher type roles, you mess with them by including misdirection roles (like mine). I'm negating that by deciding NOT to use my power, and therefore I am strengthening the more important town PRs.
I feel a lot like I did in Dynasty Warriors I, where I claimed 1-shot doc right off the bat to help town POE. I have a weak role that is actually negative utility here, so I'm canceling myself out. I get the added benefit of possibly freaking out scum, because what if I have no role at all, or what if I do have a strong role. So they need to decide what to do about me.