There's someone with some obsessive ill-will toward me who I'm still Facebook friends with.
Given that, when I friend people, under what circumstances will this ill-willed person find out about it? (Assuming I've set up my privacy to not reveal anything about my friending actions). For example, if I friend someone who my nemesis is already friends with, will my nemesis see my new befriending?
And how would any of this change if I "unfriended" the nemesis?