> Meet in real life -> Add on facebook.
This is facebook's core value prop though. To flip is would be fundamentally flip what facebook's good at - creating a deeper digital connection with ppl you meet in real life.
Meeting ppl on facebook became weird and creepy when they became too open. It wasn't an issue so much when they were closed to college networks. They sacrificed privacy for growth.
On the flipside, consider LinkedIn, where it's not considered creepy to reach out to a complete stranger (recruiters do it all the time). But b/c LinkedIn has a focus (careers) and has more privacy, this is acceptable in their ecosystem.
Net net, I think the only way facebook can be about meeting new ppl and do it well is if they sacrifice openness. Otherwise the creepy factor will undermine success.