Err, let me give you another example - abortions. I love it when women (that have had abortions) or men (that encouraged women to have abortions) are becoming anti-abortions as they age.

Considering their changing minds can lead to people being convicted for crimes they themselves were guilty of, does that count as hypocrisy?

Of course it does, because such opinions don't come with a disclaimer. Any conversation with a child or a school principal about drinking should start with "You know, I got wasted several times in college...".