Go to edge or chrome without an ad blocker and do a search for software or something. You will get adware, malware, and outright wrong suggestions for the first ten results. Google AdWords does not directly host malware typically, but the sites behind them do. Fishing is trivial to pull off. I believe, as a matter of actual national security, online advertising that is deceptive or leads to deceptive locations should be illigal. I want to see heads roll when I get fake "download" buttons when trying to actually download an image for work.