The Instapundit on Twitter is not Instapundit.

Instapundit asks the faux-Instapundit to contact him.

Non-parody impersonation is a violation of Twitter's terms of service. Let Twitter squelch that account for you.

ADDED: Glenn says:

JUST TO BE CLEAR, I don’t think the Instapundit feed on Twitter is any sort of a scam. I think it was just set up by someone trying to help. I just want to upgrade it and need the keys. I figured it would be easier to ask the person who set it up for me first, rather than going through Twitter.

I can see why he'd want to take over the existing feed rather than eliminate it and start over, and while the person who started it may have meant well, I do think Glenn needs to control his brand. I assumed this Twitter feed was his and formed the opinion that it was awfully unimaginative. And as Jason (the commenter) notes, the fake Instapundit was following various Twitterers: "It's like Mr. Reynolds is endorsing them and I wonder if payments are being made for the follows." Well, that would be a scam.