Could be. It's not just for people that world perceives as evil. It was created for the fallen angels that rebelled against the authority of God, but any that refuse to acknowledge His authority will, according to the Bible, find themselves there as well. One of the most frightening passages in the Bible speaks of people who are told by Jesus that He never knew them. We can't just believe that God exists, "For the demons believe and tremble.
It is way above my head to say who will go where. The worst murderer to ever live could, theoretically, have an epiphany anytime up til death that will save them from eternal separation from God. God created two destinations for all souls following death: with Him, and apart from Him; forever. The choice is us telling God, "Thy will be done" or God telling us, "Thy will be done" - a person wants nothing to do with God here and He won't force them to be with Him forever after.
