But there isn't just one search engine and you will still have to submit all the urls of these possible hundreds of places to all of them so they can be blocked

But there isn't just one search engine and you will still have to submit all the urls of these possible hundreds of places to all of them so they can be blocked. It is a really hard or maybe impossible problem to de publicize something on the internet. Though I do think clear laws with due process would work much better then using middlemen like the search engine providers to police on their own merit.