I don't see why we cannot delete contacts from the Allow/Blocked list. The problem is when people you have had on the list at one time and chatted with no longer use their account. It becomes dormant and the way I understand it, the account, after a period of non-use gets deleted. They have not deleted me from their contacts prior to abandoning the account and therefore I will never be able to delete their name from my list. Some of us end up with a rather large list with no way to permanently clear it.
Surely I am not the only one who is in this boat!!!!!