So you'd rather have a bunch of sexually-repressed, horny men walking around than giving them an outlet for their pent-up sexual energy? I already hear complaints from women who think that all men think about sex too much. Banning porn will ramp that up to 11.
FFS, back in Victorian times they had long tablecloths to cover the table legs lest the men see them and become aroused. I never want to be so horny that I find a table attractive. Not to mention that if a man saw a woman's ankle it was quite a scandal.
Besides, porn has been around in one form or another since cavemen started drawing on cave walls. The simple fact is that since people like sex, they also like depictions of sex. Thinking your going to finally ban it from society is a lofty goal but will never work.