Bad Cinema

There are a number of films out there which depict the more deplorable acts commited by man kind, such as murder, torture and rape. Its easy to label these on screen depictions as sick and depraved, as simulating something like rape is just wrong. Also, through a mediated experience of this atrocities, audiences could become desensitised to them, increasing the liklihood of them perpatrating those crimes. However, there is arguably a good aspect to bad cinema, as, just as it can serve as a desensitiser, it can work as a deterent. The disgust which is generated by these scenes creates in us a subconscious adversion to violence etc., and so there is a decreased liklihood of people performing what theyve seen on screen.
Bad Cinema can also be used as a warning, to convey a message, as seen in Larry Clark's Kids, which is, in essence, an AIDS prevention advertisement, using the 'bad' aspects of cinema to make it shocking and provocative.
Thoughts?