Amazon bought imdb, the gigantic International Movie Database (imdb)
as it has "buy it from amzon" links. They took rightful advantage of the many discussion boards which cater to all tastes and ages.
Trolls have discovered these boards have no effective oversight and one troll in particular posts obscene/pornographic content which stays up for days.
Today's gem is "Would you let a midget suck your **""
If you report it all you see is a stock message that amazon has enough alerts on this user and will deal with it.
But they don't deal with it.
This one troll has been posting obscene threats for months on the Classic Films Board and amazon seems to be ok with it. Much smaller film sites have live moderators who hard ban trolls but amazon can't afford it.
No wonder there's talk of boycotts.