...and just hide!
This really gives me the creeps:
gizmodo.com/how-facebook-figures-out-everyone-youve-ever-met-1819822691
People have posted on here about wondering if sometimes highly inappropriate friend suggestions come from people stalking you. well, looks like its Facebook doing the stalking - by getting people to upload all their contact info 'so facebook can find some more friends for you'. Meaning - so they can match everyone in your phone with everything in everyone esle's phones and know everything about everyone. Ugh. Please don't help them do this. It's so creepy