@whoop already do. And more.
Grow my own veg, with my own compost, get drinking water in glass bottles from next door's filtered and tested spring, have a pig (Peppa) currently being fattened in the back garden and chickens for eggs.
Make all my own cleaning products with vinegar/bicarb/essential oils. Ditto with shampoo, soap etc.
Don't watch TV, I won't be brainwashed.
Still can't fully avoid things though.
Still breathing polluted air.
Don't know anyone else lucky enough to not have to choose between fluoride and oestrogen laced water from the tap, or from BPA laced bottled water.
Still eat food with poisons in every time I go to a friend's house, for instance. (Though I'd never dream of saying anything, of course).
DD's school is school dinners only, so she still gets food with crap in once a day, from a plastic tray.
Can't avoid being watched on CCTV every time you go to town, or avoid having every computer keystroke recorded and stored.
Can still be arrested for saying certain things.
Still have to pay taxes that fund bombs to drop on children, or that go straight into the hands of corrupt third world governments. If you don't pay, you're locked up.
You can shrug and say I'm mad all you like, we are not free.