Sentences like "I have a FB account and it has no personal information on it whatsoever", "If I think that anybody is able to get loads of personal info then I simply reset the security settings to limit access" and "Sign up for a closed group and if nothing else you can actually see who will be able to read your posting and/or reply" display a fundamental misunderstanding of what the mega-corp that is Facebook is and does.
Recent scandals about the misuse of Facebook data, Mark Zuckerberg and his senior execs. touring the world to look unctuous in front of bunches of politicians and media that basically know far call and understand even less, have been a gift for Facebook Inc. In hoodwinking probably 99.99% of FB users that FB is Doing Something, FB Inc. has strengthened its own already-far-and-away-dominant position in data collection, data mining, packaging and reselling.
"FB is easy to use" ... well, duh, that's because FB Inc. don't want to put people off using it ...
For those "Luddites" who would like to feed what is sure to be labelled "paranoia" and other intelligence-insulting terms in subsequent posts by FB cheerleaders, make/pour a cup/glass of whatever floats your boat, enter "facebook tracking" into your preferred internet search engine and spend some time reading at least some of the returned links.
Some time ago, thanks to an acquaintance who earned his crust in internet security and whose party piece was demonstrating just how much information is specifically and deliberately gathered about an individual as he or she moves around the www, I discovered that, between a mixture of chance and design, I have a relatively confusing 'internet profile', that was more-likely to be discarded by data collection algorithms.
I might not be any great loss to this Forum but there isn't any way on God's green earth I'm signing up to anything on FB. Swmbo is an avid user; anytime I feel I might be a "Luddite", I just try finding something remotely useful or relevant on her 'page' in amongst the overwhelming daily tsunami of utter bolleaux ...