Easytether??

Nope - It spoofs the traffic as if it's going through the browser. Just be smart and don't abuse it. You'll be good.
 
Define abuse please.

I'm taking a cross county train ride with my son, and there will be no wifi signal.

He's going to want to play WOW on his laptop.

Would one day of WOW data through Easytether be enough to bring out the VZ data police??