Hi Anna, I can't weigh in on the porn aspect but I can weigh in on the "brutal".
I'm a horror writer and a practicing Buddhist. Most people think the two are mutually exclusive but I beg to differ. The genre of horror is a direct conduit to something I believe is hard-wired into every human existence - the need to come to terms with impermanence. I see little difference from the Buddha's many suggestions that we meditate on death in a charnel ground. Horror movies or books are a relatively "safe" way to get close to the suffering that is present and possible in the world and in our own bodies. Of course, some step over the line and glorify or promote violence but for the most part, when carefully considered, it's a quite meaningful art form.
I'm quite active in the horror community and there I have met some of the most caring, pacifist people I have ever encountered. Contrary to popular belief, horror is enjoyed by a large, mentally-stable, compassionate portion of the population and I'm willing to bet that for every horror film fan who commits a crime you'll be able to find a drama genre fan who did the same thing.