shadowing NO
This has been extensively covered and debunked.
A pilot told us he once flew across india shadowing a LARGER aircraft, the post sounded like a military excerise I assumed from it he was in a fighter and the biggy was a tanker.
he stated he had to sit almost under it's wing, now to know that the pair of aircraft must have been in contact with the radars tracking them.
In that scenario the biggy would inform him of any flight path / alt changes about to happen, not the stealth shadowing scenario.
Also you could only shadow from radar in on direction., so if crossing air defence you are still likely to be picked up at radar overlap points.
James bond was not flying it and Cubby Broccoli was not plotting the flight path