Blogger being Sued

The risks of having a blog can be seen over at seobook.com, where the blogger Aaron Wall is being sued for comments left on his seobook blog. The company suing him has a very bad reputation and is trying to improve its reputation by suing people that are critical of them. I could think of better ways to improve a reputation than suing people.. like giving good service.. or doing the right thing.. and letting people know you're doing the right thing.
Anyway, Aaron is fighting them and is accepting help from anyone interested in the cause. There's more info here too.