One of my best friends has this issue. She is hijabi and does not put her pics up on facebook or anywhere else for that matter.
When we take pictures, she tells us straight up..."no facebook" and we listen. No one minds in the least.
lolz. I mostly get friend requests from Arabs and Turkish people and I have to keep ignoring/blocking them but once a 70+ white budha sent me the request that made me really angry and sick and I removed my profile pic. lol