PRIVMSG "attack" protection

on ^*:OPEN:?:*:{
  inc -u5 %xfp
  if (%xfp >= 4) {
    silence +*!~*@*,+~*!*@*undernet.org
    .timer 1 150 silence -*
    echo -st $nick Was ignored during a private flood
    auser prvflood $address($nick,2)
    halt
  }
}
on prvflood:join:#:{ ban -k $chan $nick Flood Bot }