-1
+1 for a permanent squelch list though. Even if you could only permanently squelch one pilot per month it would be worth it.
If HTC could find a way to make it so someone that you squelched. If that player left the game and that name was 'ready for the taking' again. Then that name would be removed from your 'ignore/squelch' list. Otherwise you might still be ignoring the same name that has changed hands.
Or if you squelch someone it's for a minimum of 24 - 48 hours whether they log off or not. *shrug*