People are massively dishonest about this, though. Like there are occasional Ask HN posts where someone is outraged that their bank/payment account was closed for “no reason”, but eventually it comes out that they’re in North Korea selling cannabis to Iran or something.
But it does seem like the world lacks a manual on How Not To Get In Trouble With Your Bank. “Structuring” in particular is something someone might innocently do just because they like round numbers.
That is messed up. You ask about a SAR or indicate you know about them in general, you get a SAR slapped on you, and they close your account. You're one of hundreds of thousands, why bother handling a SAR-ed user when they can just move on without you.
Are individuals allowed to have a public forum to discuss and share notes of what they did in their account to learn and prevent this from happening in the future? It seems in a lot of cases it's using these payment systems like Zelle or have anything associated with phrases resembling black-listed countries or organization.