Dude if you've worked using SS tell 'em YES( in cOllege)incase they ask you coz they're gonna find out anyway. If they threaten you too much say you have a right to remain silent & won't cooperate 'til you see your lawyer. Those people read people's face & are trained that way so don't act like your frightened. Incase your interrogated, look straight into their eyes & answer questions with no hesitation. Don't carry your SS card, CCs, DL/state ID in your wallet; just school ID. delete your work/boss phone # and/or photos if you've got 'em.
All the Best!