On average yes. Just as there is a gradient in non-targeted advertising of 'basically benign' to 'scum of the earth', I think there is a gradient in targeted advertising too.

On the basically benign end of the gradient you have the "You recently bought book X from author Y, perhaps you'd be interested in Book Z from author Y." (I don't like that stuff, I still block it, but it doesn't quite get me incensed if you know what I mean.) But the potential for harm from targetted ads can be truly extreme.