Your problem isn’t with the people using higher bandwidth. Your problem is with the company you are buying internet service from. You want them to charge you less money because you use less service; you want them to ensure your service meets the requirements of the plan you are paying for.
You should complain to your service provider, and ask them to provide a tier of service that meets your needs. If they don’t, you should look around for a company that will, and by switching, send a message to your provider that they need to be more customer-oriented.
The only reason you would be “burdened” by usage habits of others is if you contracted with a socialist/communist internet provider who lived by the rule that everybody should pay the same and get whatever service they want.
Comcast is apparently running their business on an “all-you-can-eat-buffet” model. People who don’t like paying more when they eat less because the typical “all-you-can-eat” customer is a fat slob, find other restaurants to buy their meals.
That's fine and I did. In my area we have choices. Damn the regulations, fwtw.