If memory serves, the SCIF badge is to only be worn while in the SCIF. Otherwise, it is to be concealed. Check the regs and double check with the Security Manager of the SCIF. But, my instincts tell me that these folks are in the extreme wrong and violating protocol.
Wearing badges as such could allow outside individuals the opportunity to take pictures of the badge and attempt to recreate them. This would obviously allow unauthorized personnel in areas that they are not allowed in. I would simply ask the individuals who are wearing them through the gate to ensure that they are concealed until the reach the entrance to the building.
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