Many people seem very naiive as to the amount of information they reveal about themselves on social websites.
I don't belong to one as I don't want to be scammed and on the same privacy theme I keep a shredder in the kitchen to get rid of old bank/credit card statements etc. (Having seen a TV prog recently where the team used statements found in the bin outside to gain access to a house by conning a locksmith that they actually lived there)
Karl: by your use of the term 'ppl' do you mean "Private Pilots Licence" or were you reverting to text-speak