Verizon probably already caps
I have three other power users living with me.
By the end of the third week of last month, we saw capped download speeds at 30KB. At midnight of September 1st, speeds were restored back to the norm of ~500KB. Monthly reset? Possibly.
We had called in when we saw the "cap" and the techs said they saw no problem. They even opted to dispatch a tech out to the premises to take a look. They found no problem and hooked up a Verizon router which we quickly replaced with our old router.
Since my roommates do so much with the internet from streaming, downloading porn, one guys does anime, and etc. I can only think wonder how much bandwidth we had eaten that month to enable that cap.