For extra cruelty to those who hate ignoreeof, line 42 should be replaced with:

    if($key eq "\x04") {
        print "Use \"logout\" to leave the shell.\n$prompt";
        $index=0;
        next;
    }
[download]

Of course, they will hate whoever gets to be the scapegoat for this prank, too, since they'll now have to open a real terminal and kill it... :o)

--
Me spell chucker work grate. Need grandma chicken.