Friend endlessly stalked and harassed by another player on many characters

[Picothea]

I don't understand why so many people don't respond well to this type of thing. I enjoy having stalkers because it's nice to have all the extra attention. Knowing that they can't get their mind off of you is the best part. It gives me a very nice feeling of power and control over them.

Okay. My vote for the weirdest comment in this thread so far.
To explain this as seriously as I can, while you personally have the mindset of "power and control" in this scenario, it's important to understand that most other people are not looking for either of these feelings when it comes to interacting with strangers. If anything, being stalked can actually feel like a *loss* of control in most people's perception when you have not been able to stop the stalker.
But aside from that, being orbited by a person who hates you is simply unpleasant for the average person. It's a constant jab of negativity that weighs on the person in question. I hope I am getting the point across that it isn't worth it for most people, regardless of what sense of power or control they might ponder from it.

So when people "don't respond well to this type of thing", that is their right, and I think it's a very understandable reaction. They should certainly be worthy of receiving help from support staff, too - hopefully we at least agree on that much.

Have you tried being direct and just telling them that you don't want anything to do with them? Some people may take a kind rejection as playing hard to get. It's important to be clear where your boundaries are even if it means having to be a bit rude.

I'd also like to respond to this comment and say that the fault absolutely lies with the stalker here. Even if they believe someone is "playing hard to get", there's nothing that justifies stalking a person, stranger or no. I'd never call the target of stalking "rude" for being direct in their rejection (which many have already done at that point in the interaction), it's really the stalkers who should know better.