I could see one of the more theory-heavy people (Archetype, Ash, maybe Faust) making such a claim, but I have trouble seeing it from Mail-Mi. On the other hand, if one of those such players is Mail-Mi's partner, they could have talked about it.
My instinct is that it's coming from town Mail-Mi.
In regards to PingPong's statement particularly, recall that Roles are random with respect to alignment. So town could get a scum role, scum could get a town role. This makes me think the design of roles are you're describing is less likely, but I'm not sure of that.
I think the RvR is enough to not lynch Mail-Mi today, and be okay with him not rolling if we kill the troll.
Also keep in mind, if I was scum!<person that hasn't posted yet.. BoxofDog?>, and I knew Mail-Mi was town, I might just hang back and let town crucify Mail-Mi, or at least until he uses his dice to weaken his potential power.