Well, other agencies have mostly used things like this to collect evidence against real crimes. ICE is using it to enforce Orwellian "thought crimes" where they are revoking visas and green cards, and then often just minutes or hours later violently kidnapping people for their political views. Over 6,000 USA college students so far have had their visas revoked and been targeted by ICE officers, for exercising their constitutional right to freedom of speech and freedom of association.