I am in the same situation with my son. Sometimes you may find a file that says "clean" or "radio" but not on most. It's kinda tough because I guess most people prefer the "dirty" versions. Only thing we can do to protect them somewhat is to keep hunting for clean files and scan w/AV and check the files they download. The worst thing is when you go to buy a CD you can't find anything but the Dirty Versions.