This might be strict but well, better let this be rather than nothing (as long as alternative is not found).
I remember Aeris was banned for cheating, and after some discussion he was unbanned under my responsibility.
He was told by me next: If your KPD is too high when there are many newbies you will be banned independent of cheating.
I'm going to do something similar (less brutal though) rule:
This applies to people who is at least one of the next:
1. You are admin.
2. Have 80 level character and know English.
3. Have played more than 3 months and know English.
You are ought to:
-Not have KPD higher than 7.0 if there are less than 4 (including you) high levels.
-Help newbies if you're able to (have...