I just think of SO as being "read-only." It might as well be Encyclopedia Brittannica for all I know.
I also think of the errors I read in SO as being part of that immutable encyclopedia. The only alternative is to spend time trying to correct an error which led me down this rabbit hole:
1. Realize that the site makes you jump through all kinds of hoops just to respond to a (wrong) answer or comment on a question.
2. Spend a total of 45 minutes researching and emailing two people who already are SO members. Sending them a link to the SO page that has a clearly wrong statement, and politely asking them to add a comment or whatever to make it clear that the statement is wrong.
Ironically, that wrong statement was about one of the old string-handling functions in the C standard library. So while the old usenet might have gotten a cranky response from a C Jedi who knows all the answers, it is prohibitively expensive to even provide the right answer on SO.
Luckily SO has enough correct information on it that treating it like an immutable datastore still has great benefit.