I'm sure most people would prefer private messages about their grammatical inadequacies, but the comment field could always be used with a friendly "feel free to delete this comment after you have the made the corrections" type of message. Personally, I rarely even bother. If I decided to start acting as an editor on this site, it would drive me nuts! LOL!
What I don't understand, is the amount of folks with terrible English skills, that constantly go out and look for article-submit websites to accept their junk, while hoping to make money from their chicken scratch they call "writing." Nowadays, everybody and their grandmother are considering themselves to be a "published author," so go figure... Some folks need to either get a real job or, if they must claim to be a "publisher" while having no grasp of the English language, go find a free-hosted blog site.