When you go on one of those bad sites for a movie you're searching its posted like this:The.Avengers.CAM -> meaning crappy cam version (recorded with a cam in a movie theater) usually unwatchable..Its a bigger problem for studios if a dvd/bluray rip gets posted online (posted online a day or 2 after the dvd/bluray is offically released).. When a dvd/bluray rip gets posted online even before its officially released in stores, then the crying really begins..