I think I have been concerned about this some time ago when I came across threads with images for clear understand get messed up because the images aren't displaying and outdated informationa too but Iost interest because most OPs are not active anymore.
1. Unpin the posts and encourage members to create a new similar updated post that can be pinned?
2. Let Mods edit out the outdated information?
I think rewriting those threads might be better only giving credit to the original post.
If that be the case then we all will only be charged to suggest threads which we feel should be rewritten and maybe anyone who wishes to do the work can find it easier hence stress of finding outdated threads will be eased.