It's an interesting option. But I still want them to be able to send me messages if they use another chater that has that option (send a message to someone not in your contact list). BTW, that's the second question, if I can send a message to someone not in my contact list using MSN Messenger 7.5 (or newer).
More over, I have just checked, that even if I block them (without deleting them from my contact list), they can still see me in that "who has added you" list.
Thanks