Thank you for saying this! I do agree with everyone here about the actual grievance(sasaengs) but I see a lot of implication that it's a "k-fan thing" or "korean stan culture". This is a lowkey discriminatory line of thought we shouldn't subscribe to. I think most people forget that k-fans have something most of us don't, and that's accessibility. Please don't forget that this kind of behaviour is rampant everywhere. I mean twice's nayeon had a high profile stalker from Germany(?), halfway across the globe. There are plenty of sasaengs you see on planes that are not actually Korean but are from other countries. Also it's a complicated issue as the police don't often take stalker cases seriously. Much less, if they are your "fans". 

Let's definitely not claim this as something unique to Korea.