@Jackyy.BaDitO2 and @deepstrasz - I don't think either is ripping off. I would say inspired by. Trent Reznor (Nine Inch Nails) was heavily inspired by Alfred Scnittke.
Here is a song by Schnitke to give an idea. Reznor used a lot of the same techniques and added that to his electronica style, creating a new type of genre, a fusion of rock and electronic classical, calling it "Industrial." After, many (Marilyn Manson and Rammstein) used Reznor's style for themselves, which was inspired by Reznor, thus, inspired by Schnittke.
I think you're both right in your regard. We are all inspired in different ways. I think the best thing to do is to use that inspiration and make our own music.