Rania, what a lovely, thoughtful idea.
Reminds me of something my grandmother told me...an act started in prayer carries the prayer until the act is completed. It took me a while to figure out what she meant, but I think of it as keeping the prayer going even when the "open dialog" has ended.
I, too, often neglect to actually post in those threads, but the prayers are there. I light a candle and say a prayer for everyone who asks for it, (and some who don't). It seems I always have a candle (sometimes more) burning, but that just reminds me of my friends, and the light they bring into my life.