This is going to sound stupid probably so bare with me...
Rather than inventing the 'next generation' of Link List, why not just ban the cheaters on the existing ones?
That would seem like a much better approach to the problem to me $0.02
I mean, its not like the LL owners dont have the ips / domains / emails of these cheaters anyay, they have already submitted that info to you.
As i say, probably so simple its stupid but, there ya have it
