For people who writes spammers aren't threat, I write 3 situations here:
1) Spammer makes his attack, so I block and try to hit back, and... I can't ! I'm stunned, so his next attack hits me. Why ? Oh, I forgot it's a "feature" added few patches before - spammer can stun you !
2) Spammer makes his attack, so I block and try to hit back, and... well he was faster !? How that's possible ? Oh, when you spam like crazy your attack speed is always same, so there is a chance 2nd spammer's attack will be faster than his target's attack.
3) Spammer makes his attack, so I block and try to hit back, and... bounce. Long time ago bounces were just 0 dmg attack, but they interrupted target's attack ! Right now they are 0 dmg attack without interruption. So spammer got free hit. In WFAS there is a lot of bounces, I even had some bounces against... unprotected head of opponent.
I guess people has really tough heads here.