Well that is the dilemma. But if they have a win condition that can interfere with ours, that means we do need to lynch them before we lynch all the Scum. Thus increasing our lynch burden substantially. That doesn’t seem plausible if there is 5 of them. But what if there’s fewer, maybe 2? Then eliminating them is not unreasonable.
This is the reasoning why Town needs to see all LUTHA claim sooner rather than later. Having 5 players saying “yes, I’m LUTHA” and cross-confirming each other would completely remove them as a threat, in mine eyes. Five is the number claimed and so having five actually claiming would virtually confirm them (just like claimed Masons, one would have to die at some point to confirm the group as a whole). I’d advocate lynching anyone trying to lynch LUTHA at that point, since they’d be threatening only to Scum at that point.
But either fewer or more than that indicates someone is lying. And we’d have to start lynching claimed LUTHA once we have a few Scum eliminated.