The last time I remember stealing was shoplifting toys as a kid. What really stuck with me was the shame of being caught by my parents and being made to apologize to each store.
I have evolved into an adult who is a bit obsessive about making sure I give back extra change and pens. I think I avoid even accidental theft because I've worked so often with people who are genuinely harmed, sometimes in really significant ways, when they are victimized by burglary or theft.
Late 70's. College. I was a graphic design major and discovered how easy it was to pilfer the occasional marker or sheet of Letraset press-type. That stuff was crazy expensive and I was a poor student. At least that's how I justified it. L.