I don't like the idea of voting someone who we have no evidence for or against, they die, we end up with nothing gained just one less chance of surviving. :/
Going with my suspicion.
Thing is, someone not posting can be two things.
1. They're lurking scum and unless we punish lurking, they'll continue to just sit back and surf under the radar.
2. They're an inactive innocent whose only contribution is padding our safety buffer against a loss. But it's better to lynch those than active innocents, since active innocents actually contribute to us finding scum.
Either way, it's usually better to vote out inactives when you have no leads at all.