I would say giving feedback on an write-up is more like doing a peer-review. When we review code, we try to not use words like "you" or "me" or even the name of the developer. We always say and write "the code...". This is a conscious effort on the part of the reviewer and does help a lot in keeping personal/emotional effects at bay.

Here's what can be done:

There can be a feedback center (or a small checkbox at the bottom of the editor, near the "save/post" buttons) where users can directly reference the particular article or piece of information that one finds to be incorrect and add their comments. A discreet Email can be sent out to the originator of the article, who can then take the corrective action while a visual indicator set on the piece indicates pending changes to all new visitors.

No names disclosed, no emotional angle attached and hence, no harm done.

At all costs, everyone who reads a write-up should keep in mind that the poster has spent some time and energy to research and share something with the world. That is worth appreciating, and some minor errors (unless technically incorrect) should be ignored.