Google Banning Scammy Advertisements

From Consumerist:

At last, someone has taken a stand against the tooth whitener ad menace. It's no tiny or obscure ad network: it's Google. The company has decided to live up to its "don't be evil" motto and ban advertisers who place ads that lead to sites peddling products like scammy free trials, get-rich-quick schemes, and malware. Previously, they would ban individual ads, but not advertisers.