That's not for me to decide, you'll have to talk to board management. 
Truthfully, I don't see the point in going back to old posts and doing anything with them. First off, there's good information in many old posts. If you're thinking of just "culling the chaff" from the posts, think of what a gargantuan effort this would be! I really doubt that OGR management are interested in that much extra work, I think they're pretty busy now.
Let sleeping dogs lie.
