I was a Top Secret ControL Officer with a Top Secret SIOP ESI clearance. When I would grant access to base personnel I would counsel them regarding their responsibility to keep the information undercontrol and not divulge it to anyone not authorized access. I would obtain a signed certificate which the person would acknowledge, understand and agree to maintaining the secrets to which they were granted access to.
I also explained that the penalty for unauthorized disclosure could be a penalty of $5000 and up to 5 years in prison once they "leak" was investigated and the disclosure was evaluated.
Of course the DIMBULBs wouldn't understand what I just said and they don't give a damn since they are above the law!