Well, Trevor's actor Steven expressed in interview how kids, his own, should not be privy to such adult content. I was talking about and looking into the last movie I saw the other night for GTAForums Offtopic, that being the 1978 rape revenge film I Spit On Your Grave, originally titled, Day of the Woman. If you look into the details about it's origins, up to 1980, when the title was changed beyond the scope of the director and writer. Still a great title, but it brought to the table discussion about it's contents in a serious and thoughtful manner, rather then knee jerk reaction, and as Wikipedia points out, people who likely had never even seen it, they took up a vocal protest against it, advocating censorship.
Wikipedia again cements my belief that it maybe the best source for movie data, even more then IMDB at times, since it talks about response to such films, offers trivia and production data, all very interesting to research