Also, as an active LDS member, I was raised in Illinois and was the ONLY LDS kid in my high school. While I lived a pretty squeaky clean lifestyle, my friends partied and did drugs and drank all the time and one was openly homosexual, which was hard enough for him living in a small town because everyone knows everyone. I refrained from those lifestyles because I don't believe that is how I should live my life. The LDS lifestyle may seem old and outdated to many, but living by a higher standard of moral and physical cleanliness isn't easy in a world that no longer values such a lifestyle. Being able to resist pornography in any form is hard when it is EVERYWHERE. And having friends that, although still good people, lived a different lifestyle than me. It was hard not to give in to those activities that they enjoyed.
So there are tons and tons of stories a good writer could tell as long as they don't make the characters some stereotype that is more derogatory than accurate.