How is verizon planning on cracking down on it; did they say. I am sure they can speculate from the people using 20 gigs a month when the avg user uses 5-8. Because with the droid, since you can use desktop agent on a lot of the browser, and now that browsers like skyfire uses flash. How can they tell you are tethering since the droid can literally spend 24 hrs pulling info from the web.
The privacy policy states that they can examine the destination and type of data to monitor compliance with the terms. Unless you use encryption and a proxy they will be able to see netflix streams, java applets, flash apps, and any other things not supported on the droid.
They might be starting with the highest bandwidth users because, from what I've heard, they are charging tetherers by the MB. Verizon has an incentive to go after the big bandwidth users if this is true. Who knows if they'd ever care about low bandwidth tetherers?