Another indication which is very useful as to whether the intention is good or not, and which adds on to what others have said, is if* the bad guy or evil in the film is depicted as such and is punished* in the end. The the evil gets away or doesn’t get defeated by the end of the book (or series, if it’s a series they should be defeated by the last book) then the aim of the story is often disordered.
I disagree. In my opinion, it’s not so much whether the villian wins or not that makes a work of fiction immoral but what it is supposed to leave you. In the
Berserk anime, one of the main characters turns evil and does something so horrifyingly evil it’s can’t be described here. He wins and in the manga, he hasn’t gotten his comeuppance yet. And yet, no fan roots for him, nobody supports him because they all despise him for what he did.
In Death Note, Light Yagami kills people with his ‘magical’ note book. He is shown sympatethic at first, having a noble goal to rid the world of evil but it is shown that despite crime rates dropping because of him, he becomes mad with power, people are worshipping him as a god and in the end, he didn’t make people do good nor did he end evil. Death Note is supposed to make you think; whether Light Yagami is good or not is up to your own interpretation.
And while many anime have some immoral elements, they’re rather small (such as fanservice) and don’t get in the way usually of what it’s trying to say. I say usually because I avoid blatantly exploitative or immoral anime and books. In Song of Ice and Fire, there are some sex scenes which are borderline pornographic yet I continuereading the series not for the sex scenes but for the story which involves much more than lewd sex scenes. It’s epic, brutal, has great characters and tons of political intrigue that is really interesting.
In conclusion, I just think that if a work contains some elements that would seem immoral in the real world but are actually studied in the work itself, I don’t think it makes it immoral unless such behaviour is outright advocated in the book itself.