If not for your past idea of how scammers operate by sending fake alerts to people, I believe you would have fallen to the scammer method of defrauding people through claiming of sending money to their bank account.
In addition, the best way to follow scammers is never to trust anyone who projects an offer that has a high return on profits. Staying away from such an offer will do a lot of good.
I don't think that a bank's customer support would provide such data to scammers but anything can happen these days. What came into my mind is that the scammer might be someone who works at that bank and has data of the customers. The banks hire anyone these days and they don't really care much about the customers. Ah, once again we got another reason to love Bitcoin.
You're right, I have been dealing with such scammers for a long time and that's why I know their tactics but those who don't have proper knowledge and awareness about such scams can fall into the trap of those scammers. The scammers mostly targeted educationally weak people because they such people are easy targets for them.
Well, I agree with you the ones who offer you high returns are mostly scammers. In fact these days scammers are so smart that it would be really difficult to know who's a scammer and who isn't one. But, if we have knowledge and awareness then they won't be able to get success in their negative intentions.