If you're a fan of Twitter, the site where you microblog using only 140 characters max for each post, then you might have heard that several Mad Men characters have been on the site too. At first many people thought that this was cool marketing by AMC or the producers of the show, but actually they were accounts created by fans and AMC didn't like that. Now they've forced Twitter to take down the accounts.

The accounts affected include Don Draper, Peggy Olson, and Joan Holloway, though several other Twitters from other characters on the show seem to be safe (for now). The official word on it is that it was a copyright infringement problem.

This is really too bad. Some of the most creative, fun posts on Twitter are being done by fictional people (not just Mad Men but others as well). I would hope that AMC would hire some people to take over the accounts for each character, to be the official Twitter bloggers for the show. It's a great way to market it.

Update: AMC and Twitter have restored the accounts!