there is a chance that he didn't pay for domain privacy, or he could be using a fake name and contact. Someone could contact godaddy and file an abuse report.

from a whois request:
Name: Ned Scott
Organization:
Mailing Address: 148 frac. Francisco lopez, Ciudad de Mexico Mexico 14835 MX
Phone: +52.3221707576
Ext:
Fax:
Fax Ext:
Email:[email protected]

WHOIS Server: whois.godaddy.com
URL: http://www.godaddy.com
Registrar: GoDaddy.com, LLC
IANA ID: 146
Abuse Contact Email:[email protected]
Abuse Contact Phone: +1.4806242505