Blacklisting is one thing that suffice. If the person blacklist evade to contact you or keep harassing you. This is a punishable act that can lead to a permanent ban. I seen it happened before.

With all due respect, OP.

After reading you out, it seems like you are too sensitive. You want to see someone gone of the game like they never existed over some Role Play drama. It is a excessive to push for more. If you my opinion is wrong, then I can accept this, too.