Thee most important things to me are:

1) that the rest of the list subscribers do not get bothered by MORE
UNSUB requests going to the list

2) that those subscribers don't emulate the poor practice of trying to
communicate with the list-owners by broadcasting to the list

3) that said requester get off of the list ASAP

So not only do I DELETE them, but I sometimes suggest that they send a

UNSUB * (NETWIDE

;-)

/Pete