I'd suggest setting up an account with a fake name, set everything to private so in security make sure your details are visible to "only me". Set the account up with as little information as possible, don't post anything unless it's questions within your support groups. Some groups allow the option to post anonymously as well. Don't add a profile picture, don't add friends and turn off the option for people to friend request you. It'll take a bit of time to go through all the settings but it's worth doing if you want to be as invisible as possible. Hope that helps.
The whole thing is confusing to me. I was reading this morning on Reddit some people who have attempted to create a totally private facebook page that's not linked to any of their other accounts. Their knowledge of how to do that is way beyond me.
You seem to have 2 types of people these days on the subject of privacy. Those who are suspicious if you want to be private, what are you hiding. And those who want to be totally private because they see others' access to their lives as an invasion if it's not invited (and if there's undue interest).
I'm of the second camp. I know there are dark and secretive people out there, but I just want a degree of bullet proof privacy to protect myself from those. I'm not afraid of real physical threat or identity theft or anything, it's just the principle that my life is my own.
We are supposed to be more connected these days but with the lack of privacy I find I'm way more disconnected as I won't discuss anything openly with anyone online.
edited to add that I came on here to reply to Peach8 and ranted at a tangent instead
so the reply is the problem with a fake name, etc, tried that but there's a lot of blocks along the way, having to provide ID etc. I don't want to go against facebook I just want privacy.