My grandma was a fluther-like moderator when it came to grammar and word usage. My dad to some extent also. Even in adulthood, although not as often as when I was a child of course. I do it for/to my husband at times also (he is ESL).
Maybe if we were modding people it would make up for some slack when teachers are not doing their jobs well; kids would still learn some decent language skills.
Thing is, we can’t go around correcting people constantly, it slows things down too much probably. Plus, sometimes we can tell when a mistake is laziness vs. Really not understanding what is correct or the proper us or definition of a word. Are we going to correct every little thing regardless?
As far as emails and texts, I really think it is a waste of time to mod those for typos or sentence structure. In more formal writing it makes sense.
If we were a culture of correcting each other, maybe people would be better at taking criticism, that could be a good thing. I think Americans as a whole don’t take criticism well.
If situations like bullying were constantly being modded that sounds good to me.
Modding during an argument, psychologists get paid well to do it. Thing is, who is going to mod an argument between someone and their spouse? There is a privacy issue of course. Unless the couple is arguing in public. Certainly if a 10 year old says something mean to another 10 year old we would feel fine about stopping that behavior. Or, maybe most people don’t unless one of the children is their own? Maybe if we all modded those kids all the time they would grow up to be a bullying adult.