Reasonable suspicion can mean detaining someone, but you cannot invent reasonable suspicion. Which is what you are trying to do.
Best practice for these innocent Americans is to stop hanging out with illegals.
Because you might get caught up in the declared invasion net for no fault of your own except that you like to hang around with invaders.
Choose your amigos wisely
Saying the word "Immigración" doesn't invent anything, Counselor.