they really don't like the fact that a private flight can fire up and dissappear without anyone knowing where they are going or who and what they have onboard and not talk to anyone.
and they're going to have to suck it up, because in a free country (which we certainly used to be) this information comes under the 'none of your goddam business' category. I'm sure they'd like 'flight plans' and 'special branch approvals' for yachts, speedboats, private cars, buses, Lambrettas, unicycles, rollerskates etc but the same applies.