Why are people seriously arguing with someone who claims SGU is pornographic?

It's such a blatantly absurd position it's not even worth the effort to discredit.
Reasoning through an appeal to emotion. Appeal to ridicule, an informal fallacy not because it's your opinion but because of manner in which it is presented.
For instance the wiki recognizes:
In the second half of the 20th century, pornography evolved into the men's magazines such as Playboy and Modern Man of the 1950s.~
http://en.wikipedia.org/wiki/Pornographic_magazine
Don't lie to yourself just on my behalf. I appreciate that you believe what you believe but this is a disagreement that is both evident to all kinds of contrary facts and argued in all sort forums for all sorts of reasons. To my knowledge Playboy only uses nudity YET this article says it and others are properly classified as pornography. That is more than a casual implication.
AJ86
True, it's difficult to have a rational debate with someone who's only point of reference for morality or reason is an inherently immoral and irrational bronze-age scripture.
Debate is about logic.
The above is an appeal to ridicule and is not part of rational debate. Emotion is not the method of making a rational conclusion but does happen to be the preferred method of reasonings of mobs everywhere.
His last few comments have proven that the only points he'll actually contest are the ones he can reduce to something subjective, and simply 'his own opinion'. The problem of course being that these opinions stem from scripture, but when you question his belief in it, he either ignores obvious requests for the supposed 'good reasons' behind it, or else runs away from questions about his belief citing "aggressive lack of acuity", though only when it suits, of course.
Firstly. I have no obligation to entertain and assist your prejudices and nefarious agendas. I didn't confront you. You engaged me.
Secondly, (concerning your prejudices) Your lack of acuity is self evident. For instance I tell you one thing about my beliefs and you present a
strawman miss-interpretation of those beliefs because of the difficulty of creating a direct counter argument: Aside from the fact that you seem to wish to argue opinion vs opinion and or confidence statements, such as (that's just not good enough) or (that doesn't justify) despite the presence of precedent and source materiel that begs or implies to differ.