meta, I didn't get the same view from the movie as that. I watched part of the movie again a couple of weeks ago and I mentioned to my wife that the character who had the abortion looked sickly and sallow for the rest of the film, insecure and troubled. Though I don't think that covers for the casual almost cavalier attitude they give the abortion, nor the irresponsibility of the idiot that got her pregnant, it is an almost subliminal warning. Attitudes are changing about abortion and have already made a huge turn since the early-mid 80's. With work, they will continue to change.
I have to disagree, but I did get the feeling that the original intent may have been to show the ramifications of free sex and abortion, but someone rejected that theme and kind of just ignored it and went for the "stoners are funny" angle. The consequences angle was so "almost subliminal" as to have been nonexistent in my opinion. It would have been better to just have avoided the unwanted pregnancy completely as it came off as cavalier. The character seemed more upset that the guy did her and forgot her than she was about killing a child which was never even considered.