This is not on topic, but in brief... ATC is not the same (in terms of enforcement) as the FAA inspectors. ATC themselves have inspectors and if one should be standing behind a tower controller and they both witness an unsafe maneuver, they can report it, but normally ATC is like you, just trying to do a job and they're not out to police you as you should not be out to police them. As for dipping.... remember, it's one thing to dip in a Cessna 172, and later a Citation, but once you get into these unsafe habits it's hard to break them.. one day you'll be in an Airbus or MD11 and that dip, can cost you your and many others lives..