Seriously. Take a look at the official site for the excellent open-source Windows graphics editor Paint.NET, for instance:
Now tell me where you are supposed to click to download the actual application. It confuses me, and I'm an experienced user who knows to look out for these sorts of things. I have no idea how normal people ever find the damn thing.
My question is: whose fault is this? Is it Paint.NET's, for allowing the ads onto their site? Or is it the ad network's (Google, in this case), for accepting the ads into their network?