Nonsense. Squawk 1200, and once airborne, you're free to use the radios. The point about not using the radio on the ground was to ensure that you could actually get the craft off the ground without the current owners or FBO knowing what you were up to.
The entire article appeared to be presuming that ATC was only concerned with "safe, orderly and expeditious" flow of air traffic and not with murky ownership of the aircraft. In my (non-repo man) experience, that is all that ATC cares about.
ATC won't care about #3 ever. If you're not in class B, ATC won't care about #2. Jets are allowed to fly VFR, too; they just don't very often. In class B, you can get your clearance by cell phone, and start using the radios once you get to the movement area (or at a non-primary class B airport, when taking the active).