It depends; many of us realize we're already on plenty of lists of "undesirables", so OPSEC measures like that are not yet needed, although it might be a good i

It depends; many of us realize we're already on plenty of lists of "undesirables", so OPSEC measures like that are not yet needed, although it might be a good idea to get in practice now. And it's not just smartphones, all will at minimum triangulate to the nears cell towers while on.