It seems to me that your beef should be with advertisers who choose to avoid the content network, not with Google (especially since Google has taken any number of steps to encourage advertisers to use the content network).
The best way Google could encourage advertisers to include the content network is to get rid of the MFA's. If there was a standard for quality in what is acceptable for AdSense I think some would come back.
[edited by: annej at 8:56 pm (utc) on Mar. 8, 2007]