"When you subscribe to StopICE, the system asks only the area where you want alerts and the phone number to which to send them. You don’t have to provide any other identifying information."
BRUH.
So not only is he compiling a dataset of telephone numbers, he also sending out sms to those people, its fucking trivial giving the timing pattern that this causes to unmask his userbase to the goverment. An lets be real here, once they have the number it dosent matter if its a burner, if its on (and it has to be for you to get those alerts) you are creating movement patterns that will make it in turn trivial to gov to see who owns that number.