The movie's moral code isn't found in Seth but in Evan.

Throughout the movie Evan serves as a foil to Seth's misogynist diatribes when he protests Seth's characterizations of his crush, Becca. As early as the scene in which Seth makes Evan buy him a Red Bull at the gas station, Evan is offended by Seth's lewd praise of Becca's supposed ability to fornicate.

When Seth decides to ditch Fogell with the police in the liquor store, Evan objects multiple times to abandoning him. He simply can't believe that his best friend would abandon the friend who is risking his neck to buy them alcohol and popularity.

At the close of the party when Seth drunkenly comes onto Jules in the hopes that she too is drunk and will make the mistake of sleeping with him (a misogynist idea indeed), Jules professes that she doesn't drink and would much rather hook up with Seth when he is sober. In the end, the message is that girls respect you more when you're yourself and liquid courage is not the key to a successful relationship.

The moral compass is there. It's just often overshadowed by the humor of the movie. After all, nobody came to Superbad to see a morality play.

Most of these teen movies have a moral compass but as you say it is often overshadowed by the humor of the movie. But typically at the end there is a quite movement (brief) where the moral compass is allow to shine.

Below is a post by someone on American Pie an about how sick that movie is and that it has no moral values. I don't watch teen movies (I'm 50), but I have seen AP on TV and that poster is just full of shit. AP had a very moral theme about sex and relationships.

I guess some people just cannot see pass the humor and see the message that is there.

I've always figured in comedy it's not the morality that matters, so long as the movie isn't entirely absent. No one goes to American Pie to learn about sex and morality - what matters is that the message isn't entirely depraved.

Rather I meant "as long as the morals aren't entirely absent."

The humor in teen movies are like Family Guy. Its just joke after joke with no relevant plot line or character development and probably written by manatees. Not necessarily a bad thing either, since sometimes you don't want your movie to be all preachy with messages.

The morality was cheap and undeserved. No one had any revelations and Seth's character never believably changed. He just did through the magic of lazy scriptwriting. Why would any of those girls reward him for being such a pig? Only in la-la fantasy land would a girl be that beyond critical thinking to not see how messed up Seth was and how he wanted to take advantage of a girl in her drunken state. Evan was the moral compass but there was no logical reason why Evan would wan to hang out with someone like Seth, and when they got down to discussing it, it wasn't discussed. They kept introducing questions and then dismissing them with another gross joke or a physical injury. This wouldn't be such a big deal if people weren't giving this movie so much undue praise. If the movie wants to have a heart, then HAVE one. If you want to be a gross-out comedy, then be one! Don't just lazily throw all the elements in there, but of course, they can do that because Apatow is such a cult figure that people will buy into his crap (I mean crap literally) so who cares what he puts on the screen?