Alright...the buffet analogy...
Sure, you do pay for $15.99 for a buffet...but does that give you the right to stay there all day long and eat all day long? At one point, they would kick you out. If you dont believe me...i've seen some real hard stuff go down in an Hometown Buffet before...and in Vegas...This one woman was asked to leave because she took the entire tray of lobsters for her table...twice. When they were kicking her out, she screamed at the top of her lungs claiming she paid to eat as much as she wanted to. "its an all you can eat!" it was pretty sad.. (not to draw judgments but for illustrative purposes...she was reminiscent of your typical "wal-mart" fare)
If you pay for the buffet and can 'consume at whatever rate you want'...does that give you the right to take the whole ham hock instead of the slice they serve you?
Suppose in the car analogy...ATT is the government. You pay the government (local or state it doesnt matter..lets assume its "the government") to use their toll roads. As long as you pay the toll on this road, you can drive on it as much as you want, as long as you want, all day if you wanted to, you can "use the road" all you want essentially making it unlimited. It still doesnt give you the right to drive however you want..You can "tether" (see what I did there?

a trailer onto your car if you want but you would have to pay extra on the toll road...Carrying trailers makes your car heavier which puts more stress on the roadworks. Additionally it takes up more space, and it makes traffic behind you move a bit slower. (Driving behind a trailer is miserable

).
Doesnt it make sense that the people tethering trailers without paying the appropriate fee for the road are doing something untoward?