What is knowing someone?
As I consider how effectively I can tweet, Facebook link and read blogs of people, I have a sense of "knowing" that certainly belies the actual act of getting to know someone. Can I go up to someone I just met a week ago and say "we should go for a Coldplay concert when they come in town cos I know you and I love Coldplay"? I say not - it seems like in today's world, this connection has to still follow the decorum of olden days.
In contrast, I argue that seeing that someone I just met and knowing their interests lets me have a more meaningful conversation vis-a-vis a "get to know you" conversation.
What wikihow tells you is not going to be as effective if you already know a lot from the stalker-esque life.
CIO Hits the nail on the head - that stalking is too bloody easy these days and you got to wonder, how do you develop true depth in a relation/friendship and "know" someone.
Anyhow, the crux of the world today is, there is still a tremendous "creepiness" that comes from knowing a lot about someone from Facebook and to some degree, you still have to develop a slow friendship/communication to make the information something you use.
Thus, go speak, and develop stronger relationships beyond the general tidings about weather and sports and start developing an understanding of people, their mindset and how they actually think.