There’s really nothing more frustrating about an online marketing campaign then when a competitor is using less-than-favorable techniques to get higher search rankings, or gain Twitter/Facebook followers, etc. Rand Fishkin of SEOMoz produced a great video to help you combat some of these techniques, and explains why ultimately, they will not work.
I’m a huge fan of SEOMoz and all the work they do in the Search community. If ranking on the first page of search engines is important to your business, take a moment to check out this great resources. Their research tools are second to none.