So it OK in starbucks but not on Linkedin?
I dont think I would expect to be firted with / hit on as the customer of any business, so I dont think it acceptable.
Likewise I wouldn’t flirt with customers of my business, totally inappropriate.
Do you not get that?
No, I think the LinkedIn guy suffered the consequences of commenting on the photo of a flipping psycho. The poor guy did nothing wrong. A bit gauche maybe, but not wrong.
As for not flirting with a customer of your business, how is is that people are supposed to meet other people? I fully accept the need to stay away from lines of power (e.g. medical professional and patient; teacher and student; lawyer and client; clergy and, well, pretty much anyone), but where there is no power and/or danger invested in the interaction, then I say fair game.