I've done 2, 4, 5, 8, and 12. 2 and 4 are essentially the same thing, you're brushing someone off with the pretext of busy-ness - the fact is I DON'T check my phone at work and me and my friends often mess around on our devices while we're hanging out so I would have no problem texting then lol.
Some of those can apply to avoiding people who are trying to be friends but that you don't really want to be friends with either.
I don't get 1, because what's brush off about telling someone to have a good night? That makes zero sense to me, that's literally just manners. And I do sometimes use it to stop talking to people, but not as a long term brush off, it's usually because I'm either legitimately tired or overwhelmed from talking too much.
3 can go either way - I sometimes use it as a brush off if I'm angry at someone or if I'm not interested, or sometimes I'm just not feeling chatty. Though again, I'm more likely to ignore a text for the time being if that's the case.
As someone who lacks initiative romantically (I'm terrified of rejection), 7 doesn't make sense to me either. I'm not likely to make even subtle maneuvers to gauge someone's interest (like how they suggest someone would ask what they were up to that weekend) and am always asking people how things are going because I'm engaged in other people's lives. And it's good manners.
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