I think there are two kinds of posts along these lines.

-People who are genuinely trying to point out an error or correct misinformation.
-People who like to correct others "on account of they are so smart."

Sometime I think the initial posters jump to the latter conclusion out of embarrassment of their error.  Not much you can do about it.

Now, I am going to hide my Cheerios before my next post.

Have a great weekend everyone!  I will be leveling and bolting my new safe to the garage floor.