Oh, I do. I'll quote them and correct them, but they usually don't go back to fix their post to avoid confusion.
I'm just thinking about future readers that come across the post. They could see that it has some Disagrees and can know something must be wrong/incorrect, rather than having to read the whole thread to get the full picture.
The problem I see with that is a "Disagree" reaction is vague. To me, it doesn't signal there's an error in the post it's attached to. It only tells me someone disagrees, not why they disagree, nor that a post is incorrect, nor that I should read further for a correction.
If a future reader happened on a thread that might have incorrect information , and they didn't want to read through it to find an answer, a couple alternative strategies might be:
- click the "sort by reaction score" control below the thread title
- start reading on the last page and work backwards
The first presumes they know how to use the forum software well enough to click that control. It also presumes that the best (most correct) reply has sufficient positive reactions (Like, Love, Haha, Wow) that it sorts near the top. That's a pretty significant assumption about reactions, though. It's kind of like relying on Disagree to signal incorrectness: people post reactions for various reasons, which may not match how a reader interprets them.
The second is based more on practical experience. It presumes that once a correct answer is posted, there won't be a lot more replies. Or if there are replies after a correct answer, they're likely to be "Thanks, that worked" or perhaps added detail. If those quote the correct post, as they often do, then a single click takes you there. Also, if there are corrections for wrong answers, those would be after the incorrect post, so you'd see any correction.
Obviously, any strategy one uses will make certain assumptions about the kinds of things posted (replies or reactions), and the quality and correctness of those. I think the important thing is to have several strategies at hand, not just one.