Hmmmm ,yes it might be helpfull .
I sure did some ignoring and unignoring too.
Why not add a little message with it...the why or an apology with it maybe.
And yes apolllo in case the person has ignored YOU too , than it will not work...but the concept sounds good.
Maybe the AChat Team can make a option for that aswell ,if both sides did a ignore and you decided to unignore a person !!?.
Kinda lets kiss and forget

PS: Might be nice if a request for Friends, lover or spouse comes along with a little message