something like
Code:
on !*:join:#chan:{
  msg $nick hi $nick $+ , to avoid kick answer by: test ok
  set %test_ok $+ $nick 1
  timertestok 1 6 if $($+(%,test_ok,$nick),2) ban -ku600 # $nick 2 no answer
}
on *:text:*:?:if (($strip($1-2) == test ok) && ($($+(%,test_ok,$nick),2))) unset %test_ok $+ $nick


change #chan by yours