Fair enough -- but that has nothing to do with race. The authors discovered a correlation there but that's not the point. If it turned out Foo Bar was a name that happened to correlate highly with people who would pay for arrest-related services, then advertisers would fill in the gap.

So sure, should there be mechanisms in place that can prevent "libel" in Google because of correlations between names and less-than-savory behavior (regardless of race)? Yes, of course. If my last name is Manson it is probably a bit unfair to me as a person if Google is advertising stuff to people searching for me as if I am associated with a famous serial murderer, too. But the implication that this is all about race and is some systemic racist thing is just data mining and likely the authors projecting their own biases. I'm sure you could find all kinds of interesting clusters of names that have certain negative advertising, and only a subset of them would be clusters that highly corresponded to race or ethnic groups.