What about to change just a little bit the behavior for the Quote function
once the post is submitted the board advises the quoted user that someone had quoted him/her.
So the quoted one can respond to the interlocutor as soon as possible.
It is some kind of automatic function similar to "Subscribe topic" but the differences are:
" function sends an advice by email if a new post is submitted into the whole topic the user is following.
My "Advise me if someone quoted me
" function sends an advice only if someone quoted me...
[Well... it was pretty clear
Could be the admin to choose to allow this board behavior on the basis of permission and of course it has to be the user to activate for him/her self that function and choose which topics and how it works: activate or not the email notifications for example or just to have a list of quotes into the board itself.