There are multiple ways to address problems with objectionable content. One is not to have it, which is what the author proposes. Spam detection works well to

There are multiple ways to address problems with objectionable content. One is not to have it, which is what the author proposes. Spam detection works well to eliminate email you don't want to see but nobody seems to have figured out how to apply it to social media content. Part of the problem (I guess) is that most of us agree what spam is whereas objectionable content is very much in the eye of the beholder.