Amazon also has a big problem with spam in physical books, IMO. For example go to www.amazon.ca, select Books, type stargate as the word to search for, sort by publication date. Items 2 and 269 are legitimate (maybe 267 too, not sure), and everything in between is garbage, mostly copied from wikipedia.
For example why does Amazon Canada allow items with titles like:
Stargate: Aflevering Van Stargate, Personage Uit Stargate, Technologie in Stargate, Volk Uit Stargate, Lijst Van Afleveringen Va by Bron Wikipedia (Paperback - Jul 2011)
Kanadai Filmek: Angyalsz V, Stargate: Continuum, a Fantasztikus N Gyes ?'S AZ EZ St Utaz , Csillagkapu: AZ Igazs G L D Ja, F?r Sz IV by Forr?'s Wikipedia (Paperback - Aug 2011)
Fiktiva Milit Rer: Fiktiva Generaler, Milit Rer I Tintin, Knasen, Obi-WAN Kenobi, Lista Ver Rollfigurer I Stargate, James Bond by K. Lla Wikipedia (Paperback - Aug 2011)
This used to work very nicely about two years ago. Now the good stuff is so deeply covered in junk that you can't even find it any more. I hope they fix it soon...