Yea, I agree with my mommy, those sites are really bad for your computer. Even if you're just viewing files, there's still huge chances for your comp getting screwed up! (I know! I lost all of my files when my comp crashed cos someone was doing indecent things on it)
T_T

It also puts wierd programs on your comp without you knowing, and will program you to get pop-ups from those sites, and sometimes those pop-ups can have bad things on them, little kids shouldn't see them. o.o