That's fine. Your arguments will not come of stronger to the reader, they are strong or they are not and we're all clever enough to read through the occasional grammar error.
And that's where I think the guidelines could be expanded a bit more to restore the balance. Something along the line of 'HN is visited by people from all over the world and from many different cultural and linguistical backgrounds. Please respect that and realize that native English and Western background should not be automatically assumed. It is the message that counts, not the form in which it was presented.'.