A friend of mine complained that his posts were deleted because is grammar was poorly constructed, I was like,it should not be and that it must be more to it.
If for any reason a post will be deleted for such, it must have been that the post is such meaningless that the point is not clear enough. Please am I right? Or what do you think?
How did your friend conclude that his posts were deleted because of grammar? For sure, there's another reason unless some of his English posts were constructed so much poorly that even how far we concentrate and focus to read it several times, we can't understand what's the meaning of it.
I'm assuming most of that deleted post were in his inbox
(in case of deleted threads, there is no notifs). Since you already have knowledge about some of the reasons why posts got deleted, you can ask your friend to show you his inbox so that you will able to see those deleted post. You can now conclude from there if that post was a real candidate for deletion.