Another Argument that an Eternal Hell is Just

This one is from William Lane Craig.  I used Jonathan Edwards' argument last time.  

Hell is a just desert for evil.  Justice requires that a person be punished for as long as they do evil.  If those in hell continue to sin without end while they're in hell, then they continue to merit punishment without end.  

Of course I still think Edwards' argument works as well.  But there's no reason not to double up on arguments for those that aren't compelled by Edwards.  This also goes to strengthen the conviction of those that are persuaded by Edwards that an eternal hell is just, for those in hell aren't being punished eternally for committing merely one infinitely wrong action, they're being punished eternally for committing infinitely many infinitely wrong actions.