When their parents turn up all I hear is "NO, I don't want to go home" or "Can I have five more minutes?". Which I know from experience would turn into another five minutes and another. And all the parents do is simper at them ineffectually from the front door (while letting all the warm air out).
I have started taking matters into my own hands and hustling the children out the door myself, handing them their coats, shoes etc.
Don't get me wrong, I'm not claiming my children are paragons of virtue, but there is no way I would stand for this performance.