I can see rules against necroing being needed for some communities.

For example, a guide written at the release of an MMO would be pretty useless when you have games like Everquest running for 25+ years.

Telling some to "just camp" an item (for example, the Circlet of Shadows) is useless because the version they're talking about no longer drops. The info is no longer valid, because the pre-nerf version was super useful, the current version has some use at super low levels (too low to solo camp the item) but with the way the game has grown and expanded, its not even necessary. You can unlock an ability that does the same, eventually.

Bumping that post would at best be a massive waste of time or currency to acquire.