Some people crack the shits and become hostile when we fail to inform them if they've already seen a particular title. Whereas other people become understandably irate if we DO remind them (because... you know... they're not stupid).
I just served a woman who was angry. She wanted to know who she can lodge a formal complaint to. "That would be me, Ma'am". She was furious that we had allowed her to hire the same TV show twice in a row. She told me that we should be legally required to notify anyone who is hiring something they've seen before.
I never respond well to unreasonable (moronic) aggression and so I launched into a response, which went something along the lines of...
"We can set up system alerts for you if you wish but we find that most people prefer that we don't bother them with unnecessary reminders. After all what they watch is their choice and many people watch films more than once. In your case we're talking about a television series. Its very common for people to hire the same title several times, usually because they weren't able to finish it previously. The fact that you hired it twice in a row suggested that you needed more time with it. And I am not sure how it is that you don't remember hiring it just last week... but again thats none of my business. If you require such reminders then we are more than happy to put an alert into the system. That's an easy thing to do but we do NOT make assumptions and I do NOT respond favourably to unreasonable confrontations."
And despite me telling her that we can set up alerts in the system and notify her of all repeat transactions she still persisted with the legal argument. "I could sue you" and "I met my lawyers would pick you apart" were two of her closing remarks. Yes well... good luck with that. LOL