Pop ups still occur, even on legitimate sites. Tripadvisor creates a pop-under when you click on a search result, for instance. Basically, the user will click

Pop ups still occur, even on legitimate sites. Tripadvisor creates a pop-under when you click on a search result, for instance. Basically, the user will click something at some point, the page can then unexpectedly put malicious stuff into the clipboard. No amount of protecting will stop this.