The Denver Post noticed the case a few days back, and it's certainly an odd one. Video Professor filed a federal claim in a Colorado court against 100 "John and Jane Does" who committed "unauthorized Internet disparagement of VPI and its products" on web sites such as infomercialscams.com (the site, incidentally, is the number three Google result for "video professor").
The complaints generally follow a similar theme: Video Professor allegedly markets products as free to try, then pitches callers with upsells that confuse them into signing up for subscriptions. A recent comment from "Tina" is typical. "I had purchased one piece of software from Video Professor... before I knew what was happening, my credit card was overdrawn and more attempted charges were constantly occurring. I kept calling customer service, returned the original software and heard many promises of the 100 percent refund, less S/H. This has been over 3 years now."