Abhinav Pathak Y. Charlie Hu Zhuoqing Morley Mao Peeking into Spammer Behavior from a Unique Vantage Point. 2008 LEET http://www.usenix.org/events/leet08/tech/full_papers/pathak/pathak.pdf conf/nsdi/2008leet db/conf/nsdi/leet2008.html#PathakHM08