Who will play on their server? Again and again, every week someone open the server with default fluxcp theme, hercules/rAthena with public stuff and after they got 10 online -> server dead.
Look at this topics: http://herc.ws/board/forum/50-server-advertisement/
I understand why you care, but trust me, no one will saw that they steal your stuff, because this server - public sh*t, and its true.
If you make good server players will play it, if you make server like BrillianceRO it will be dead after 1 month.
And after it die ONLY 10% of admins will think what they do wrong, but 90% will continue steal stuff and trying to open their sh*t again.
One way to fix this problem: blacklist, don't give pay/free support for this admins, don't sell/give them src/npc and other stuff.