Here's the website. My ideas, off the top of my head:
1. Buy the outlines to your class, find the errors, and deliberately frame the exam around those errors.
1a. Moderate version: Just tell the students that's what you're going to do.
1b. Candyass version: Tell the students that's what crossed your mind, but of course you won't do that.
1c. Reverse twisted candyass move: Tell the students that's what Althouse emailed the law school faculty that she thought of doing and she's kind of person who would do it.
2. Buy the outline for your class, rewrite it to fix errors, make it clearer, and otherwise improve it, and send it around on the class email list — free.
2a. Lazy version: Buy the outline for your own class. Tell the students you know they are buying the outlines, so you're just going to distribute them, free, and warn them that mistakes may be in there and you haven't checked. At least screw up this website's profit model.
3. Legal approach: Bring a class action on behalf of all the lawprofs on the list for copyright infringement, etc.