This happened to me a little while ago.
I went to my bank (major bank in my country) because of some unknown transactions in my account. I sat down with a guy and we looked at my transactions history, etc.. and the issue was resolved in a few minutes. As I was about to leave, we had this exchange (T is the teller guy; Bar X is a bar in my city where I had been only once a few days before):
**Me:** Alright, thanks for your help. Have a good day.
**T:** No problem, come again if you have any issues in the future. By the way, how was the beer at Bar X?
**Me:** Excuse me? What do you mean? (I didn’t remember being at that place, I didn’t even remember the name of the bar)
**T:** Oh, I saw you went to Bar X from your purchases, and I go there often. They have a great selection of craft beer, don’t they?
**Me:** Ah, sure yeah. I only went once by yeah.. it was good.
**T:** Great. Well, have a good day. Bye.
I didn’t really know how to feel about this exchange afterwards. On one hand I understand that the guy meant no harm and was just trying to be friendly. But on the other hand I felt it was extremely unprofessional of him to bring up something that was within my personal bank transactions. It made me feel “naked”, if you know what I mean. And sure, I know that bankers can go through individual transactions all day long because it is part of their job. But being confronted directly in person about that was different.
This was obviously of no consequence for me, a very innocent exchange. Now just imagine if I had bought something questionable, or I had been to some place that wanted to keep private. It could have had serious implications for someone else in another country.
This episode really cemented my belief that Monero is absolutely necessary, as we transition to a global digital currency.