There are other ways. One could, for example, report the sites - there are atleast two sites that are owned by the same jerk according to various sources - to Google, Phishtank or Netcraft.

http://www.google.com/safebrowsing/report_badware/ http://www.phishtank.com/ http://toolbar.netcraft.com/

EDIT: You can also report them to McAfee Secure and Authorize.net. I don't think they are happy about having a scamming merchant using their logos.

After spending a little time in the... darker side of computer security when I was younger all I can say is that there's certainly something to be done and it's a tad more direct than Google bombing. This guys pretty lucky he hasn't angered anyone important because he's pretty low on the scumbag scale.

If this had happened to me it would have actually been enough to make him my new favorite target. Judging by a quick purview of the source of his page it probably wouldn't have ended up pretty well for him either.