I am extremely cautious about Facebook, and do not use it to communicate with friends/colleagues in Cuba. They have been cautioned by their bosses not to use Facebook due to privacy/confidentiality issues. I have nothing on my FB page, no time-line or anything else.
Despite many security notices to be cautious about posting personal info on-line (including FB & travel forums) it still astounds me how many people post info about what flight they will be on, dates of travel, credit card company, cell-phone company, vehicle information, etc. Identity fraud anyone? >:(