SirEyeball: they don't I have tried 
 Big_Boss: Well....but why?  
 If the know the link, they can simply contact the host asking to remove that file. 
 I have given them links to abandonware sites and the likes and this is the answer I got.  
 "Thank you for bringing this to our attention. Unfortunately, practice has shown that dealing with such sites rarely yields any results. Even if we take down a torrent, another one will spring up in its place on the next day. We (both GOG and CDP RED) believe that the best way to fight with piracy is to give the gamers a better offer than the pirates.  
 I will forward this to our PR/Marketing guys, however, and they will figure out if and how to deal with this." 
 Pretty much stating that it would be an uphill battle