Hmm. When technology basically took away musicians's ability to sell digital music files, the world pretty much said, "figure out a new way to sell music."
So, "figure out a new way to advertise." Welcome to disruption.
Maybe browsers should block ads not served over HTTPS? The ad networks will upgrade to HTTPS real quick. :)
I think you're the first person in this thread to explain why this problem is still allowed to exist.