Facebook hit a milestone in August with over 1 billion users active in 1 day. Some of that may prove advantageous by opposing counsel. What you post publically could be very interesting to an attorney who is trying to build a case against you.
Many states consider what you post publically on social media to be for public consumption. As long as an attorney or attorney’s representative does not try to contact you via social media, their viewing of your post may be considered the same as reading a magazine article written by you. That may or may not show your best side in a court of law.
Even if opposing counsel cannot use material you posted in court, you may give them information that could be disadvantageous to you.