Sorry I have to post (and I suppose that is a very meta thing for me to do), but I have never heard of replying to old posts referred to "Necromancing." The thread name caught my eye and had me a tad confused.
Most people don’t call it necromancing, but simply necroing a thread.
Basically bringing something old bad is necroing something.
And as it’s true on a lot of forums out there, it’s encouraged on IYNO. Not only could there be information relevant to people that may have never seen it, but it also helps keeps threads together. Having 10 threads spread out about one subject is too messy.
Most often times, other forums might news and updates that will quickly become irrelevant if necro’d later on. If you play a game that’s at patch 10, someone reviving patch 4 doesn’t help anyone and can lead to false information.
Nudist/Naturist info just doesn’t change that much. :p