I don't think you have to assume terrorists are stupid, good OPSEC is hard. Particularly re. phones / internet, it only takes one mistake to link a phone numbe

I don't think you have to assume terrorists are stupid, good OPSEC is hard. Particularly re. phones / internet, it only takes one mistake to link a phone number used for nefarious activities with your identity. (I would expect them to use phones, at least - they have to coordinate somehow.)