Is this so wrong-headed?
Sorry, I'm with the Feds on this one. LA isn't so desperate for cash that we need obnoxious morons like that Irish kid in our country. Let him come back when he's a little more mature and ready to take things more seriously --- and less likely to "destroy" something, such as a car, a random pedestrian, a plate glass window, someone's head with a beer bottle, etc.
Many claims are made here that people don't publish nefarious activity on their Facebook pages. But experience with people who have committed violent, heinous crimes shows that's not true. After most big shooting, a look at the perp's FB page reveals shocking stuff. Rarely does violence just come "out of nowhere." Moreover, friends don't lie: the Feds can tell a lot about you from the company you keep. If half of your best friends are on a Terrorism Watch List, then that will raise a big red flag --- regardless of what you do or do not say on FB.
If you don't want government official trolling your social media accounts... then don't post on social media. Privacy is still a right, albeit one that people seem more than willing to give up for next to nothing.