[ppml] Definition of "Existing Known ISP"

> In general, if you are assigning /32s to customer utilization, but, not
> to independently routed segments (e.g. you have a bunch of customers
> on the same server each assigned a /32), then, no, you don't meet
> ARIN's definition of an ISP.

i don't think that's true.  some of these customers have VNC or PPTP but
only for certain udp/tcp port numbers.  it's an allocation to an entity
other than oneself.  if the PTR RR doesn't prove that, then we should tell
folks to SWIP such /32's.  but fundamentally, the mere fact that there is
not a hard network does not mean that these are not downstream allocations.