[ppml] /29 limit for ARIN SWIP whois

[michael.dillon at bt.com]

> If you want your entire address space to have the same 
> reputation as the worst of your customers (either current or 
> within the previous year or so) that would be one approach.

Most ISPs have AUPs which let them get rid of such customers
in fairly short order so that they DON'T get a bad reputation.
Some, like us, are more proactive and have tools which seek
out bad actors and block their traffic before it causes costly
abuse reports to come in.

By publishing the WHOIS directory, ARIN is foisting the cost
of dealing with bad actors onto their victims.

--Michael Dillon