Perhaps in the case of some individuals, there may even be a negative link: finding a non-destructive outlet for violent tendencies. I recall seeing a recent article (the title and site escapes me) that posits something similar with regards to the rise of internet pornography and a seeming reduction in serial killings.
We are starting to see choking accidents during sex at higher rates than before (very obviously because it is being popularized through pornography).
BDSM has also had a popularization through various media and that is becoming more ubiquitous in everyday life.
Video games are clearly fantasies you can't ever live out (you can't be the guy in GTA because you'll go to jail). But pornography is a fantasy you can very easily replicate, and I think that difference is important here.