Cannibals en masse
This is because the guy who tried to get some delicatessen did not allow the filmmakers to present his case and German law did not overrule this with artistic concerns. Well, Mr. Meiwes can now stay in prison for the rest of his life with the glory that there are four biographical pictures about him that only very few people will ever see.
That's probably no big loss to the film world, and judging from the one movie I saw (Marian Dora's "Cannibal") you have to be quite weird yourself to enjoy this kind of picture.
Nonetheless, "Cannibal" is an INTERESTING picture, but only watch it if you are accustomed to very gory scenes and don't mind some homosexual action, too. If you consider that everything more or less happened that way you get an idea in what a strange world we are all living. It's an interesting discussion wether we need to see that on a big screen, but I think if such a film stays to the facts (which this one probably does) it's not a misconception to present it to mature viewers. See it as a kind of documentary and a disturbing view in some very distorted minds.
Here is a mini-filmography of the four films:
Dein Herz in meinem Hirn (2005) directed by Rosa von Praunheim (starring Martin Molitor & Martin Ontrop)
http://www.imdb.com/title/tt0418345/
Cannibal (2005) directed by Marian Dora (starring Carsten Frank & Victor Brandl)
http://www.imdb.com/title/tt0910548/
Rohtenburg (2006) directed by Martin Weisz (starring Thomas Kretschmann & Keri Russell)
http://www.imdb.com/title/tt0448400/
Cannibal (aka "Diary of a Cannibal") (2006) directed by Ulli Lommel (starring Jillian Swanson & Trevor Parsons)
http://www.imdb.com/title/tt0826817/
available on DVD here:
http://www.laserzone.ch/dvd/detail/1004890.htm
Here's an interesting German article on the first two movies:
http://www.heise.de/tp/r4/artikel/21/21403/1.html