Potential Hazards of Online Romances

[jaeangel]

I have a problem.
I recently found myself chatting with a Type Five (From the Five Common Types of Internet Dominants thread in Knowledge Base - TG) in a chatroom. I didn't start the whisper, he did. It came out that he'd seen my profile a while back on MSN, and was lurking around waiting for me to enter one of the chatrooms so he could 'pounce'. Not that he came out and said it that way, but that was how he made it sound.
Anyway, we got to talking, and my location caught his attention. When I checked his profile, I found that he actually lives barely twenty minutes away from me. WALKING. Fortunately for me, he doesn't know where exactly I live, and I've been careful to give him the impression that I live somewhere in the inner city.
My problem is this; now, every time I sign onto Messenger to talk to one of my beta readers about my stories, he's there, sending me IM's. He's trying to push me into telling him where I live, and also trying desperately to talk me into having an affair with him and cheating on my hubby. I've cancelled my AIM account, and am on the verge of cancelling my MSNIM account because he's just so damn persistent. I have told him, politely at first, then increasingly more rudely, that I have no interest in him other than an occasional chat about our lifestyles, and I am certainly not going to imperil my marriage for a two-bit, pushy, cheating (he also is married, according to his profile) posing Dom wannabe . I've stopped just short of profanity, but he still doesn't seem to get the message.
Should I switch roles, put on a Domme atttude, and try to order him off? Does anyone think that might help? Anyone have any suggestions, or any stories about your own experience that might help? Please. I'm really creeped out.