If everyone did this, everyone would avoid roster disruptions as well as working G days, and everyone (including G day workers)
I understand and agree with your point, but I can't see why anybody would have to live like Edward Snowden just to avoid calls.
Just don't answer when you don't have to. And if you do, say no. It's really not that hard.
All the spy kit in the world isn't going to stop G day heroes from dutifully rushing to the Batman signal.