Well, said, Douglas. That is the purpose, exactly, of "might could." Delay, hesitancy--"might could" is indicative of a passive state. It lets people know the "might could" person is holding back, giving the other person a chance to state their case. It's slightly disingenuous--"might could" might mean "might not" as easily as it means "might could."

But all in all, it's a phrase with peace and sociability in mind.

I'm from the Midwest and the phrase isn't even used here very often, but there are numerous hesitant phrases I employ on a daily basis, just to get by and avoid confrontation. In some ways, it's pathetic. In other ways, it makes perfect (common) sense.

But everything else aside: you've hit the nail on the head with your interpretation.

"...I will not even waste my time getting to know you."

And how many folks have missed that golden opportunity? Were they able to weather the snub or did they just drop dead of mortification? We might imagine how much better the world would be if everyone spoke like a damn newscaster but I continue to thank nonexistent gawd day in and out for regional color and open source idioms.

My English is intelligible enough even without perfect grammar and inflection and I would rather hear mistakes made and chances taken than to waste time with friends forever looking down their boogerless noses at me. You are a snob, Miss Lynda. And I think your name is misspelled as well.

You might could observe what others do in a similar situation, and using experience and adaptation as a response, just fucking roll with it.

The world is not a grammar seminar, buddy pal guy friend.