While I agree there's reason to keep the "bad guys" (whoever they may be) from following your flight/plane thru adsb out, how much info gets out to potential bad guys thru your phone/tablet etc?
Privacy is lost forever... Unless you wanna disappear. And to do that, many hoops to jump thru.
I don't like it. But, short of walking away from everything into the wilderness and foraging for the rest of your life, there's little one can do about it.
We use plastic, we drive cars with OnStar, fordpass, Google maps, gps, in major cities there are cameras everywhere. China is using facial recognition to know where everyone is all the time.
Stores in the US use grouping (did you come in with family, or just follow that family in?) for "cart counts."
Amazon and other on line retailers are poised to start sending you stuff you didn't order, but their AI knew you would want.
If you feel better writing your Congress Critters to stop tracking you plane; go nuts, have fun. Unfortunately, you're tinkling into a gale, and it will do you as much good.
JMHO, YMMV.