People change. Prisons make some folks worse, this is true. But, many people come out of prison with no desire other than to lead an honest life. One of my best friends over the past year or so is a felon; spent several years in prison on a drug-related crime (a serious drug-related crime, not a little weed in his pocket). When I went to Mexico for a month, he's the person I trusted the keys to my storage unit (with tens of thousands of dollars in gear) to. Why hold a mistake made in someone's youth over their head for the rest of their lives? How does that make a better, safer, more peaceful society?