I think the problem is when your english becomes completely meaningless is when mods try to delete that post for poor grammar. We all know majority of people on the forum are Non-English native so you can't expect a fluent and grammatically accurate english.
Trying to learn English, practice and double check before click on Post. Grammar is important, but it is not hard to learn and manage basic grammartical things to write understandable posts.
English is a fluid and forgiving language. Even on a pretty global forum like this, I only rarely see English so bad that I can't understand it at all. As long as you actually have some ideas to express, you should be fine. You should keep in mind that poor English is more difficult to read, though, so if you know that your English is imperfect, it'd be courteous to keep your text to-the-point, and to do some extra checking to minimize errors as much as possible. (I do the same when writing imperfectly in my second languages.)
I think the problem would have been with the post itself. It would have been a post with zero importance to this forum. Or it might have been a topic about which there was already a mega thread going on otherwise just faulty English doesn't calls for post deletions.
The forum born and actively run so far as a place for idea discussions, and everyone have their rights to deeply think of creative ideas. Then, if they have creative idea, they can bring it to the forum to discuss for help, for expand more, for business services, whatever. Idea is most important component of a good post.
This forum exists to provide a platform for the free (but ordered) exchange of ideas. If you have an idea to express, then it is probably possible to do it here as long as you follow the rules.