And how is the average user to manager their meter? There are no intuitive controls. How do you stop that prankster on unmetered service from pingflooding you

And how is the average user to manager their meter? There are no intuitive controls. How do you stop that prankster on unmetered service from pingflooding you so you're charged hundreds of dollars? Now that ads cost me money, I have good reason to do adblock. Does it cost as much to download that file from a congested line as it does from my ISP's cache? And when there's still congestion do I pay for all the retransmissions from dropped packets?