The market will, anyway.
They're going about this to prevent scammers, but it won't matter. Scammers will find ways to scam and you doing this will only make them come up with more clever ways of scamming, just like how RS stops botting and people come up with smarter ways to bot.
People put too much respect into fb when ti doesn't necessarily mean all that much, though. I guess it could be used in this manner, but fb just doesn't mean as much as everyone makes it out to be.