I totally disagree with you on that one Ivy. For me, it's the same argument as 'video games make you violent'. Does playing monopoly make you a millionaire? Nope. Its about the individual.
Bundy was a psychopath. His interest in porn was not a symptom of his psychopathy, nor was his psychopathy a symptom of his porn addiction.
Regarding your argument on the perils of pornography, lets look at a country like Japan. The Japananese are well known as purveyors of...well, disgustingly weird and freaky shit when it comes to their porn (think: Hentai, tentacles, doujinshi, incest fantasy, rape fantasy, etc, etc). By your logic, Japan shoyuld be rife with sex crimes. In fact, the opposite is true; an increase in the availability of pornography is linked to markedly
reduced rates of sex crime and sexual violence.
This trend has been studied and documented in other countries as well. There's many more articles available, but researchers based at the University of Hawaii published an interesting piece on it which I'll link to for convenience (I have it bookmarked)
http://www.hawaii.edu/PCSS/biblio/articles/1961to1999/1999-pornography-rape-sex-crimes-japan.html