Simple solution. Leave your cell phones at home. People survived before the invention of the cell phone.
I find myself worrying if I forget my phone. What if I miss a call? What of there’s an emergency? Then, after a moment I worry that I’ve become an damned fool.
Or Faraday bag them.
Or this
Cell Phone Anti-Tracking Anti-Spying GPS RFID Signal Blocker Pouch Case
https://www.amazon.com/gp/product/B00ITR3KCQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Works like a charm and it is cheap at under $9.
No, the simple but drastic solution is not going underground and fighting back. These Marxists will never stop unlit they are stopped.
We had pay phones then.