I really hesitate to mention this, but it's getting very annoying.
Awhile back I met this kid on Bleakrock. Several of us were joking on zone chat and he joined in. He seemed nice enough, a bit immature, and so when I got a friend invite I accepted it. Honestly, I accept almost all friend invites.
After that, he began whispering to me in-game. All the time. Like every time I logged on. At first, I was polite. After a couple of days, politeness soon gave way to indifference and that to eventual coldness.
Why don't I ignore him? Defriend him? We're both in a guild and he's an officer. I tried ignoring him and he caught on quick and went after me in guild chat. If I defriend him, he's still an officer in the guild and will see that. I don't want to hide myself - go "offline" - because I do have friends I want to see when I'm online. I don't want to quit the guild because I have friends in the guild. (Friends who've even notice his behavior and told him, politely, to back off a bit ... )
Now every time I log on - within minutes - he's chatting with me. And every third chat line is setting up voice. I've voiced with a couple of others in the guild so he knows I have a mic, etc. and he knows I've done it before. This is what he wants - constantly. That and personal information.
Another habit he has is showing up where ever I am, as if he just turned up there. (Is there like a radar app that people can use to find others?) The first time I unfriended him he did this. If I try to tell him I'm going to bed for the night, but don't log off immediately, he will send a chat within a few minutes: "I thought you were going to bed.

"
I could have lived with this annoyance but last weekend, before the update, several of us were discussing where we worked IRL. I noted that I work for a research institute funded by the Federal government. Foolishly, I gave the name. The government requires the institute post a list of all employees online and, yes, people can use that locate us (that's what it's for, in part).
Last night, while chatting with me, he admitted going to the site. He even joked about it.
Enough is enough. I want this guy gone and now. And I know I can ignore him, but then he follows me in the guild. Is there an alternative that doesn't include me quitting the guild? Also, is there a way to track people in the game?
Edit: I also know this is "feature" of MMOs. I just want a defense.