Because social media is a perfect indicator of terrorist intent?

https://www.theregister.com/2025/03/06/uscis_social_media/

Uncle Sam mulls policing social media of all would-be citizens

The US government's Citizenship and Immigration Service (USCIS) is considering monitoring not just the social media posts of non-citizens coming into the country, but also all those already in America going through an immigration or citizenship process.

Back in 2019, the Department of Homeland Security, which runs USCIS, decided anyone looking to enter the US on a work visa or similar had to hand over their social media handles to the authorities so that they could be looked over for wrongdoing and subversion.

In fact, this goes back to 2014, at least, to one degree or another, and has been standard procedure for years for foreigners, particularly those coming in on a visa.

(Related)

https://www.axios.com/2025/03/06/state-department-ai-revoke-foreign-student-visas-hamas

Scoop: State Dept. to use AI to revoke visas of foreign students who appear "pro-Hamas"

Secretary of State Marco Rubio is launching an AI-fueled "Catch and Revoke" effort to cancel the visas of foreign nationals who appear to support Hamas or other designated terror groups, senior State Department officials tell Axios.

Tools & Techniques. (How paranoid is enough?)

https://www.bespacific.com/meet-rayhunter-a-new-open-source-tool-from-eff-to-detect-cellular-spying/

Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular Spying

EFF: “At EFF we spend a lot of time thinking about Street Level Surveillance technologies—the technologies used by police and other authorities to spy on you while you are going about your everyday life—such as automated license plate readers, facial recognition, surveillance camera networks, and cell-site simulators (CSS).  Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out CSS around the world.  CSS (also known as Stingrays or IMSI catchers) are devices that masquerade as legitimate cell-phone towers, tricking phones within a certain radius into connecting to the device rather than a tower.  CSS operate by conducting a general search of all cell phones within the device’s radius. Law enforcement use CSS to pinpoint the location of phones often with greater accuracy than other techniques such as cell site location information (CSLI)  and without needing to involve the phone company at all. CSS can also log International Mobile Subscriber Identifiers (IMSI numbers) unique to each SIM card, or hardware serial numbers (IMEIs) of all of the mobile devices within a given area. Some CSS may have advanced features allowing law enforcement to intercept communications in some circumstances. What makes CSS especially interesting, as compared to other street level surveillance, is that so little is known about how commercial CSS work. We don’t fully know what capabilities they have or what exploits in the phone network they take advantage of to ensnare and spy on our phones, though we have some ideas…”