I even asked why others have had their accounts closed, but they couldn't give me an answer on specific cases.
It might be related to the trigger points banks have. Banks have different types of trigger points each representing a certain category that could be fraud, suspicious activity, tax report triggers and so forth
Banks never share any information concerning their customers in such a fashion, so I'm not surprised they didn't say anything about it, and I'm glad they didn't, because they should value individual privacy.
I even called the bank once to ask whether or not I'm at risk as well, because if so I would move to another bank, but they said everything is perfectly fine as long as you remain operating within their policies.
I think that sums up pretty nicely what I was referring to when talking about trigger points. It's smart for people to first read through the terms of their bank, especially before conducting transactions involving higher amounts.