How can anyone even try to defend Ad-networks in this day and age is beyond my understanding. Tl:dr "This malware changes DNS settings on the router and effect

How can anyone even try to defend Ad-networks in this day and age is beyond my understanding. Tl:dr "This malware changes DNS settings on the router and effectively becomes in control of your internet traffic." How can one disable STUN server requests in webRTC (i.e Chrome)?