There is one thing Google could do that would eliminate the vast majority of this sort of thing. They could require a manual review of all ads and advertisers before putting each ad into the pool. Like traditional media does.
But that doesn't scale, so it's not going to happen. But avoiding something because it doesn't scale is a deliberate choice, and I think it's fair to consider Google to be at fault for allowing this state of affairs to continue as it is.
There is one thing Google could do that would eliminate the vast majority of this sort of thing. They could require a manual review of all ads and advertisers before putting each ad into the pool. Like traditional media does.
But that doesn't scale, so it's not going to happen. But avoiding something because it doesn't scale is a deliberate choice, and I think it's fair to consider Google to be at fault for allowing this state of affairs to continue as it is.