and as many people have pointed out already, ICE subpoenas are not self-executing: if you refuse to answer, they have to go ask the local AUSA or US district court judge to issue a second subpoena, which then can be opposed and objected to in court. 8 CFR § 287.4(d). and we’ve all seen how well they do when they have to show up in an actual grown up court.
so when I would get one, I would call back the requesting agent, (politely) point this out to him and send him packing to go talk to his AUSA. and then I would never hear from him again.
now… I know they’re being way more aggressive now. But if you tell me that Meta, Google, and Reddit don’t have resources to oppose them in court, when I, a single litigation attorney working for a small company, did… well, that’s less about “can’t” and more about “don’t want to.”
(None of this has been legal advice and I am not your lawyer.)
/end