Because you sent LinkedIn request to USCIS staff: Is this a new ground to deny naturalization?

A US citizenship applicant was denied naturalization after sending a LinkedIn request to USCIS officials. USCIS stated this action raised concerns about potentially threatening or improperly influential behavior, equating it to threats their personnel face. An attorney commented that it was an unusual case as there is no accusation of any actual contact but just a social media invitaion.