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Yeah, that sucks. I’ve had the same thing happen with one of my (former) gay friends; he just wouldn’t drop it. It was really uncomfortable, and I eventually dropped him as a friend because he refused to respect my boundaries.
I mean, yeah, I get it; you don’t really have a choice over how you feel. Some people experience limerance, and it’s not a choice, but how they act is. I’ve had the displeasure of experiencing limerance a number of times, and each time I’ve found that it was more productive to cease contact with the person than to, well, do exactly what your online friend is doing.
Mostly a movie trope now. Casinos are full of video cameras, and are owned by large corporations; they’re not going to want to pay a large legal settlement because you got beat up by a security guard. And, BTW, most large chain stores with security usually tell their loss prevention officers to not get physical with shoplifters for the same reason.
You’ll usually just get thrown out and banned for life from any of their properties.
When casinos were largely owned by organized crime? Probably pretty accurate, if you were lucky.