Personally I think if someone wants to watch porn let them, for me I just don't like it. I have a woman I love and I couldn't ask for more. If some guy/girl needs to watch some other guy/girl do what said individual can only dream about then let him/her.
When you think about it, being a pornstar is the same as being a hooker except a pornstar pays her/his taxes, maybe that's why the government lets it slide

All in all, sure pornagraphy CAN be addictive, but really it depends on the weak mindedness of the individual, not everyone who watches porn is an addict. I've done it in the past, and I didn't want it anymore then I got it, if one of my friends had a magazine sure I'd sneak a peak, or watch a video but that was it.
To claim pornography is a drug or causes an addiction is ridicufuck, a person could get hooked on watermelon if they really wanted to, and if enough people liked watermelon and ate it all the time I'm sure they'd find a problem with that too.
I suppose I'm done bitching/ranting. Meow