atleast they Used to,
http://www.chillingeffects.org/notice.cgi?sID=2763
searching google for "child porn" gives a frighting number of seeming actual results. and far fewer websites that are trying fight it. and I didn't notice one chilling effects take down notices. but I noticed them on every page when I searched for "lolita" a few years ago.
that's a sad state of affairs