Wait really? This guy gets an unban? Jesus, if there were ever a clear case for a perma-ban, this is it. He never gave a good reason, and admits to ignoring you.
I take it this is one of your IRL friends? If so, you should only unban if you are taking responsibility this time. At the very least, it’s your honor on the line. This one is your call, but we really need to watch this guy…