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).
b) atc will probably notice when your 1200 blip is doing 250kts and climbing at 2000'/min.
c) this also assumes you can figure out how to turn off xponder mode S (transmitting your 24-bit ICAO address) back to mode C or mode A