As long as the post doesn't only contain the one sentence: "Manga was better." there's really no basis to go around warning people. Even "this was different in the manga" isn't really a spoiler unless the poster goes on describing how it was different, and the anime would have somehow fixed itself later, and thus the poster would have revealed that fix before its time.Originally Posted by Yukimura
I'm not personally reading the Naruto manga and I won't take actual manga spoilers kindly.