“National mathematical societies can stop publishing the agencies’ job adverts, refuse their money, or even expel members who work for agencies of mass surveillance.”
Really ? Perhaps the author should produce a list of organisations and companies he thinks it is okay for mathematicians to work for. What if the Royal College of Obstetricians were to decide to exclude doctors who work for family planning groups, or the Society of Biology were to decide to exclude anyone who worked at the Oxford Biomedical Sciences facility?