-policy exile talk is just bad play, but both town and scum engage in bad play
-omgus is what it is, again, not scum or town tell to me
Wrong and wrong.
What does scum want to do? They want to
A) Make sure the exile is a town player
B) Make sure that they don't appear to be the one who drove that exile when the player flipped town.
So any strategy that helps accomplish both those goals is not just bad play, but scummy play.
Policy exile talk is the perfect example of this -- you're literally saying 'we should exile this person' without saying 'this person is scum'. So there's no backlash if you're wrong. You can just say 'It's a shame they were town, but we're better off without them.' So that's scummy.
OMGUS is a little different, because it's not generally something scum does intentionally and tactically, but it is something scum does more often than town because it's an emotional reaction associated with emotions scum are more likely to feel. It's basically the same argument as "defensiveness as scum tell".
Everyone will get defensive when they think they're going to be exiled. But for scum, being exiled is a much worse hit for their team. They also feel more of an affinity for their team because they know who they are and have actually worked with them as a team. So when you think you might be the day 1 exile and you're scum, there's just more pressure all around. Getting killed hurts your team more, and you're more worried about letting down your team. So you're more likely to respond with more frustration to less pressure. This is, in my mind, the single strongest scum tel, although it does diminish with player experience to some extent.
An OMGUS vote, just to close the loop, is not just any vote for someone who's voting for you. It's a reactive, frustration-driven vote for someone who is voting for you. In this case, Jimmmmm sort of disguised it as a real vote, which is pretty common, but it read to me as an OMGUS vote based on the context and the timing.
TL;DR both these things are scum tells, not just bad play, don't @ me, let's exile Jim