I really think that there should be a warning or alert for Manga that is Adult-Rated. I know that one should research a Manga or at least know the plot before downloading it, but not everyone does that. I recently downloaded a manga called Futari Ecchi because I thought the name was interesting. I had never heard of it before so I was quite suprised when I opened it and it was a Hentai Manga. It would be really helpfull if there were warnings for downloaders.