It was a coworker of mine when he and I were the only young people in our workplace, when we would go on break he'd have these balloons and ask me if I wanted to pop them... I thought it was sort of weird but still innocent (and I was a lonely pickme that was desperate for work friends), but then my friend (who has a balloon business) posted on her insta story of this weird guy offering her to pop balloons on FB messenger... And that guy was my coworker! I couldn't fucking believe it, so I blocked him on all social media and on my phone, but then the other day he found me on Whatsapp so I had to block him there, I joke to my friends now that he'll try our work emails because I can't block him there.