Years ago I bought my dad an Audible subscription, but because it was a gift I signed up with my email address and then changed it to my dad's address on his birthday. Somehow I ended up inside his Amazon account because I used his email address. I guess some of the backend logic is hard to get right the first time.
Another time I was talking to a credit union CTO who was dealing with someone blocking other people's account access by picking a random account number and making 3 bogus guesses to lock them out. At the time the credit union had a policy that required calling them to unblock... which was a PITA on weekends when people need money.
Another time I was talking to a credit union CTO who was dealing with someone blocking other people's account access by picking a random account number and making 3 bogus guesses to lock them out. At the time the credit union had a policy that required calling them to unblock... which was a PITA on weekends when people need money.