I am Facebook friends with 7 JWs, three of which are family. The other 4 asked to be Facebook friends long after I had left, just so they could play games with me. Most of them block me from seeing things on their Facebook page, including my sister. I no longer play those silly and am ready to delete them.
If you want to keep the peace, you could accept them as friends and then block them from seeing anything you post, until you post something you want them to see. If they ask, you can just tell them you don't use Facebook much.
As far as an apostate profile, you should definitely put down that your favorite TV shows are the Smurfs and any TV show with Neil deGrasse Tyson.
Your profile picture should definitely be old Charlie.
Good luck!