Think about new crimes that exist today that our founding fathers never dreamed of, and then consider crimes that were crimes back then (like having an ice cream soda, or shopping, on Sunday) - but are no longer - or crimes that are on the books today, but maybe should be removed. For example, think of some things that are illegal today that were not 100 years ago - like being able to purchase over-the-counter morphine. Or 13-year-old girls being able to get married without parental consent.
On the other side, has anyone heard of people being prosecuted for committing adultery recently? (Other than in the military. Wink ) It happened in NY just a few years ago in 2010:
Woman Charged With Adultery to Challenge New York Law