Something

alias inviter {
  unset %invitedchannels
  unset %inviterchannels
  :start
  set %inviter #Give-Me-Head $+ $rand(A,Z) $+ $rand(1,10) $+ $rand(A,Z) $+ $rand(1,10)
  set %inviterchannels $2
  inc %invitedchannels
  if (%invitedchannels > %inviterchannels) { halt }
  else { join %inviter | invite $1 %inviter | part %Inviter Hahaha | goto start }
}