I think it would be excellent to have some topics along these lines but I don't think they necessitate their own sub-forum. In order to avoid 'forum sprawl', we try to avoid creating new forums unless they are required in order to set appropriate parameters for discussion. As it stands presently...
Personal stories of good deeds can go in the Personal Experience forum.
True stories of other Theravadin's good deeds can go in Theravada For The Modern World.
True stories of non Theravadin's good deeds can go in Lounge.
Fictional stories of other people's good deeds can go in Dhammic Stories.
Anything of a particularly devotional nature can go in the Shrine Room.
As you can see, there's no shortage of places whereby these things could be discussed presently.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)