Innocence and Values

Over the last while, I've come to realize how utterly innocent and naive I have been and still am. I'm the kind of person who tries to assume the best in everyone and assume that they have a good enough brain/sense of values to not do things that I would consider stupid. For example, Until I was about 14-15 ish, I thought that people who drank were evil... You can tell that my parents never drank ever. When I was 11, I had to sit next to this guy on a plane who kept on drinking beer, and I was so totally shocked that someone would do this. In addition, I have always thought that people who smoked were pretty "from the devil" as well. I'm not so bad as I used to be, but I still struggle with it... for my opinion of people decreases slightly upon finding out that someone has smoked, done drugs, etc. I know that I shouldn't judge, but I kind of always assume that people hold the same values as me... I cannot say that I haven't sometimes desired to give myself away before married, just get drunk, etc. in times of much doubt and darkness for that would be lying, but then my conscience kicks in and goes: "Well, that's a waste of money, it will only bring you disappointment, it's important to look after yourself as you're a temple of God, etc." and so I don't. And thus, I assume that others don't either, but I guess they do?

I guess I've lived a pretty naive life, haven't I?

P.S. I guess that's what grace is all about, isn't it?