Something

mute {
  if ($1 ischan) {
    var %c = $1
    tokenize 32 $2-
  }
  else var %c = $active
  who $1
  mode %c -ohv $1 $1 $1
  if ($2 isnum) {
    var %u = $+(-u,$calc($2 * 60))
    tokenize 32 $1 $3-
  }
  ban %u %c $+(~q:,$address($1,2))
  if ($2) notice $1-
}