I was a vandal when I was a teenager. I spray painted things and I stole everything I could. I don't do it anymore. I am very sorry I did the things I did. I don't like hurting anyone. I have respect for people now and I think of others first; something I didn't always do.
Don't sweat it. If you weren't a shithead when you were younger, then you might be a shithead now. At least you got it out of your system early!