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AG4Life - 3:10 pm on Dec 20, 2010 (gmt 0)
I agree with what most people have said so far, that this really should be a private thing between Google and webmasters, not something made public to an audience that doesn't understand nor has the ability to do anything about the problem. By all means remove the pages from the index, but a public warning serves no purpose, other than to embarrass the website's operators (who can be considered the victims here).
They could even pull the admin email from a whois for the domain and email webmasters that way if they don't have WMT accounts, it's all better than a public "warning" and not actually telling the webmaster about the problem. It's like the police going to the home of a victim of identity fraud, posting a huge sign outside that says "this person's identity is being used by criminals", without first informing the victim.