What one could do to prove this type of abuse would be to do a daily search for terms you think should match your site and record how high in the results it app

What one could do to prove this type of abuse would be to do a daily search for terms you think should match your site and record how high in the results it appears, and do it for various search engines. If you plot this over time and see a sudden drop you know Google has identified you as a threat.