https://engineering.fb.com/2015/06/26/security/fighting-spam-with-haskell/ https://engineering.fb.com/2015/06/26/security/fighting-spam... Every interaction is

https://engineering.fb.com/2015/06/26/security/fighting-spam-with-haskell/ https://engineering.fb.com/2015/06/26/security/fighting-spam... Every interaction is processed by a Haskell rule engine to check for spam.