There&#x27;s a difference between merely malicious ads (&quot;Click here for free stuff!&quot;-&gt;takes you to a site that exploits your browser) and ads that actively <i>exploit the browser</i>.  Any ad network can fall victim to malicious ads but only ad networks that allow embedded scripts can be abused to actively exploit browsers.<p>The solution is <i>dead simple</i>:  Don&#x27;t allow embedded scripts in ads.  Period.  End of story.  Problem no longer a problem.  &quot;We&#x27;re all done here.&quot;