Absolutely. In fact, I’m of the opinion that non-porn entertainment is probably more dangerous for kids as it has all sorts of left wing messages catered to them and the parents don’t care. As a parent I try to keep a close eye on any media my kids consume and alert to what messages that media has.
I'm not even just talking entertainment - I have little doubt that most industries have questionable morality and beliefs and also engage in some questionable practices.
Sex education, though, is pretty much mechanical. Kids learn about the biology of sex, how an egg is fertilized by sperm, etc. Does sex education prepare kids for all of the social and psychological consequences involved in sex, can it make a child alert to how a sexual partner may be exploiting them, can it teach them about flirting or dating? I don’t think that sex education can or even should cover the entire spectrum of issues that are involved in sex. It’s those the issues that are more socially and morally complicated than penis + vagina = baby where porn may lead kids astray.
I guess I look at that and come to the opposite conclusion, which is that sex ed should cover those social and psychological aspects as well. Kind of like my gun safety courses, incidentally.
I'd also make it so there is more than one class, spread out over a number of years, with subject matter appropriate to the age group.
Though, really, I’m not comfortable with the government (via a public school teacher) teaching my kids about sex much less morality.
And this is where parents need to step up to the plate and reassert themselves. Too many of them view school as a form of day care and don't much care what goes on there (until it's too late). Hell, recently there was some congress critter who pushed the idea of making the school day longer so as to be more convenient for parents working the typical 9-5 job (I think they were suggesting 8-6). On the one hand, I am very egalitarian and am not in favor of traditional gender roles being enforced, but on the other, I think people need to take a good hard look at themselves and do what is best for the children when they start having them, because the alternative is that you're a lot more dependent on the schools, and thus the state.