How Facebook Killed (Most) Spam Using Smart Filters

Facebook announced this week that they cut down the number of annoying messages you receive from the likes of FarmVille and Mafia Wars by 95% last year. Here’s how they did it.Do you “like” receiving Facebook messages about, say, your buddy Rich’s new row of corn in FarmVille? If not, you’re in luck: Facebook CTO Bret Taylor told Fast Company earlier this week that it’s just those kind of messages the company focused on while looking to cut down on spam in the system–way down.Mission accomplished. Such spam was down 95% in 2010. That’s an impressive achievement. But the backstory to how the company accomplished that feat reveals some of the internal thinking that could be key to Facebook’s ability to continue to grow efficiently–and become an all-around ever-stronger product–in the years to come.
http://www.fastcompany.com/1721252/how-facebook-killed-spam
http://edition.cnn.com/2011/TECH/social.media/01/27/facebook.spam/index.html