Facebook raised alarm bells among some social networkers when it confirmed that it's experimenting with letting strangers message them for a fee. As we're learning, however, it's keenly aware of the ramifications if that fee is too low. The company has confirmed that it's toying with "extreme price points," such as the $100 Mashable and others have seen, to serve as a passive spam filter. Anyone who really, truly can't wait for a friend request can pay the fee, while others who'd just bombard us with dating site links will have to rely on the
