I think I've said this before, but I really don't understand why some people like to target lurkers so much.
1) Personally, when I'm scum, because it doesn't happen that often, I'm extra-excited to play the game. I can't imagine rolling scum and then just not posting.
2) When I'm scum and I'm trying to direct the exile, it's very tempting to choose a lurker because they're easy to exile and there's a decent chance they won't show up to defend themselves.
3) Lurking as scum isn't particularly strategic -- you're essentially giving up your chance to A) manipulate the town and (B) earn towncred. Why do that?
4) There's plenty of reasons to lurk as town -- IRL business, being overwhelmed by the size of the town and the lack of information, fear of being painted as scummy for what you say (though two of those could also apply to scum).
5) Scum has had a chance to strategize about their day 1 before the game even started, with the benefit of a partner to offer suggestions. They should be coming in more ready than anyone to engage.
So with all that working against it, why push for it? I'd say it has a worse-than-even chance of hitting scum. I suppose it has the side benefit of keeping active players in the game and removing players about whom it's hard to glean information.