Okay blue c. that fills in some gaps...
The dubs in my last hall knew I was moving and they know I haven't requested my card for a new hall. What do they usually do in such a circumstance?
They will typically put your card in with the "inactive". Probably check with your ex for your whereabouts. If they're ambitious, they could notify the local congregation where you are and that you need a visit.
If they get word that I'm not a witness anymore, will my ex-husband be considered free to remarry, even without proof of fornication?
No, he needs to provide proof of fornication. But that can be rather easy to fabricate if you're not around to deny.
Would his local elders try to track my hall down? Is that possible?
Almost anything is "possible", but I wouldn't see "his local elders" getting involved. It would only be the last cong you attended or the one you live in now. They wouldn't take the word of one non-dub that you're DA. They probably wouldn't take the word of both of them, either.
I'm not worried about, if for no other reason than the guy weighs more than 400 pounds and lives in his parents basement.
Sounds hot. I've known enough cases where a dub worked super hard to prove that they were free to remarry... only to find that nobody wanted to marry them... nobody. But then, maybe there's a 600 pound sister living in her parents attic that dreams of meeting your ex. Would you want to stand in the way of her happiness? Would you want to stand in either of their way? SMASH!
The only reason I don't DA is because of the cretins in my last hall who thought I was either fake or weak as a witness. They will assume I left for one of those reasons, which is entirely untrue. I left when I discovered that the witnesses were not backed by God and not a minute before hand. And I fully admit to being just insecure enough to care about that misimpression.
The cretins in your last hall are going to say whatever they want to anyway. Your best response is to lead a full and happy life. Maybe visit them at the next Memorial wearing a white robe and partake. Make yummy sounds when you crunch the cracker and make slurping sounds when you finish the entire glass of wine. No, I wouldn't do it. But it's funny to picture.
Sounds like you are rather free to do what you want, at this point. It's just a wait and see what the dubs do now.
B the X