I think search engines block content because it is what users want. In the early internet, you'd almost always end up with a few pictures of naked girls in the

I think search engines block content because it is what users want. In the early internet, you'd almost always end up with a few pictures of naked girls in the search results, and many pages showed ads for porn sites. That's just not a good experience if you are at work and trying to get stuff done. Search engines have gotten much better, and in most cases explicit results are now only shown when you actively look for them.