repo already pointed that the ip belongs to rackspace just mail them.
AFAIK they are a reputable company that won't let this thing go
unpunished.

>repo@cannabis:~$ whois 72.3.243.92 | grep abuse
>RAbuseEmail: abuse@rackspace.com
>OrgAbuseEmail: abuse@rackspace.com
>repo@cannabis:~$

--
Nurullah Akkaya