Yes, you need to BLOCK a Nigerian mafia from your all social sites and don't let some nasty criminals to blackmail you. IGNORE if they try to contact you.
We do not have our military in Nigeria. Those stories are created by gangs.
Please kindly post their: email address, phone numbers, stolen pictures, letters including the blackmailing.
Confronting the scammer is WRONG!!! DON'T enlighten criminals with your wisdom. REPORT & BLOCK.
PHOTO VICTIM - "Do not confront the owner of the pictures, as they are victims themselves! You will only serve to further the terror and harm !" Silence Is Golden!!! I speak Polish.