I think you'd find that usefulness dimishes pretty rapidly as the problem domain expands. The reason spam filters work as well as they do is that most spam pre

I think you'd find that usefulness dimishes pretty rapidly as the problem domain expands. The reason spam filters work as well as they do is that most spam pretty much looks alike. Likewise, there are only so many ways you can phrase soothing platitudes that will get soccer moms to vote for you.