Proposed for discussion:
We need to start thinking about IPv6 and blocking. Also, IPv6 and IP users in general, but specifically blocking.
We will probably want to be able to extend block syntax to be able to block any combination of Routing Goop (top 64), RG + subnet (64 + 16), or MAC address (lower 48).
Being able to block on IPv6 MAC address allows us to conveniently block a persistent vandals specific computer, even if they move it or change ISPs. Unless they're bright enough to mangle the MAC address...