My experience was not as deeply personal or sad, but:
One Friday evening, I drove home from work and (using my debit card) decided to fill the car up (£50), then went to the supermarket and bought £10 of groceries then stopped at the tobacco kiosk on the way out and tried to spend £10: - blocked, operator told to hold onto the card and call management.
I was told I had to accompany a supervisor to a phone where I was told by a bank representative that the card had a 'suspicious pattern of purchases' and was being held as a precaution (all this with me standing about 4 yards from busy checkout queues). They asked me to confirm what I had bought - I told them it was none of their business what I'd bought. I eventually persuaded them that I was who I was and had the right to have the card and use it. I managed to avoid swearing at them. After the call, the kiosk guy told me that he'd told them what I'd bought, because he had to.
I then phoned them from home to ask for an explanation. Apparently, I didn't use the card very often so my 'unexpected' use to make three rapidly consecutive purchases was suspicious and grounds for holding and questioning me, 'for my own protection'. I also managed to dig out from them that the fact that I'd bought cigarettes was held on file as part of the record of the holding enquiry. I told them that I'd use cash from that point on and I and do now (or use my credit card).