I'm a little confused by this. Do you mean a new "Gone But Not Forgotten" section of the forum?
If so, it would be a nice idea, but the mods struggle to deal with current forum maintenance as it is. The spamming, duplicate posts, bullying, fighting etc, plus basic maintenance, updates, bug fixes all drain their time.
If somebody were to volunteer their own time to do the work, a la THIS post, then maybe it would be manageable for the mods to make the final changes.
Also, taking @patrick's lovely layout into consideration, what happens when he starts posting again after the house move? Move his thread into the RIP section, then back to the layout section?
Also also, the same rules will apply in the RIP section as the rest of the forum - the more stuff that goes in there, the more things will get buried.
I feel that a simple solution would be for any member to bump the threads that they wish to keep fresh in other's minds with a post every six months or so. Something short and sweet like "Missing Ballyercall" and that brings it back to the top of the layout section.