According to this topic
viewtopic.php?f=102&t=43038 we can see that w+s is bring speed hack and i tried to use w+s in others severs but it doesn't work so it count as titan error i hope you can fix that bug and till it be fixed put some rules about people using it
maybe
first time =1 day
2nd time =4 days
3nd time =10days
etc etc , so every one will understand what is his punishment by only ' you got banned because of using w+s speed bug'
thank's