Is this getting personal?

And here is the follow up after I told him to bring it on:

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Remember, I do know who you are, in your lower class townhouse, in your lower class life, in your lonely little space on your own. You can't even figure out some basic physics, you don't have the intelligence to worry me. However, again, you may want to consider your behavior. I do know who you are, and if I sent what you just sent me to the Police in your little corner of Maryland, I am sure you would be getting a knock on the door. 

You begin perhaps to see the wisdom of my policy of putting certain people on a list and then having nothing to do with them. This individual contributes nothing but rancor and vitriol and should have been banned long ago. These communications are threatening, intimidating, harassing and profane. Notify admin, he should be banned for this. Meantime I hope that you and everyone else will simply treat his posts as if they do not exist. 

I already did. I also talked to the legal at my office. I will report him to the police first thing in the morning. Pretty sure they can track him down via the IP in Audiogon. He is now going on a tirade via PMs, and threatening. This is serious