Have you ever been to a major university? Heard of "experimental years" or "party days"?
That applies mostly to drugs, alcohol abuse, and general mischief, not theft, violent crimes(beyond fist-fighting) or sex crimes. Most people figure out that beer and weed aren't cool anymore(for the record, I've never bothered with drugs and VERY rarely drink), and they grow up and move on. Most of those figure it out without generating a criminal record.
The kind of person who will steal from another, or make the choice to hurt or kill an innocent for his own gain, is not "experimenting". At least, not in the way that most of us did while trying to figure ourselves out.