The one that stands out for me was a bloke on a dating app years ago.
I matched with a bloke I'll call Tom. He seemed nice enough, if a bit boring & a tad persistent/needy with the messaging.
If I'm honest, I had a more promising prospect on the go, so I'd arranged a coffee with 'nice but boring' Tom on Monday, but was going for drinks with other prospect on Saturday.
Tom was out that Saturday too, at a gig which several of my friends attended. The penny dropped for me when he talked about the event in his messages - he was a 'friend of a friend', an acquaintance of my ex husband, & I had previously met him briefly through mutuals.
Well, that put the lid on it - DEFINITELY there had been no spark when our paths had previously crossed. No worries. I sent a friendly message cancelling our coffee date, explaining that we had previously met, & wished him well.
Tom was very upset. Tom was very VERY vocal indeed about just how upset he was, all over several social media platforms, which various people helpfully screenshotted for me...
.
Oddly, he was perfectly honest about the fact that I'd just blown him out for a coffee. He seemingly genuinely believed that absolutely anyone either of us had ever met (& it turned out there was quite a crossover) would agree with him that I was a <insert list of misogynistic epithets> because I had declined to have sex with him.
He spent one entire weekend raving on about it, with various mutual acquaintances telling him that he was totally out of order, & then he apparently just got over himself & went back to posting mostly about his innocuous nerdy hobby.
I was mostly annoyed by how quick a few mutual friends were to excuse him 'oh yeah, Tom's a bit of a sad bastard. Bit intense. Dodged a bullet there, Corvus!'
FFS...