My friendlist contains almost 98% of people I do not know in RL. And I bet that
at least 70% of the people on all friendlists out there are people, not known in RL. Privacy is something that is worth being kept private.
People are giving up their right for privacy way to fast these days and in turn get hacked - not only a game account, but even bank accounts - stalked, whatever ... you don't want that.