The archetypal 'bad' movie is "Plan 9 from Outer Space" [0], by Ed Wood. It holds that title mainly because of its production values.
This one has caused a stir on IMDB for reasons of moral integrity, or bending the truth. Rather odd, since this has been going on in films and similar media for a very long time.
"International Gorillay", a film from Pakistan depicting Salman Rushdie [1]. Coincidentally it was released a year or so after Rushdie's "The Satanic Verses" [2]. Ayatollah Ruhollah Khomeini [3] wanted Rushdie dead because of this novel. BTW Iranian films can be very good, like "Where is the Friend's Home?" [3].