Lemon Margaritas is a breast cancer survivor's hosted on the Seattle Post Intelligencer's citizen blog site authored by Susan Metters who seems to me to be a pretty brave person with a good sense of humor and positive attitude. Recently she checked out Mingle2.com a dating site recommended by a friend.
One Mingle2 feature is that it offers a blog rating system. Using film rating codes, it scans your blog and rates it. To her surprise, Susan received an NC-17 rating, the new equivalent of an X-Rating.
Why? Because she used the word "breast 27 times, not to mention "Hell" twice and "drugs" once. By contrast, the blog, received a spiffy clean PG rating even though I used the word "dick" twoce, both being the first name of a person who left a comment.
This shows you a certain bone-headedness of ratings based on keyword searches. We know that until we have a semantic web, computers will lack basic common sense. You would just hope that the same statement wasn't true of the people who run those sites.