Oh, recently saw a green-grocer selling onoins and refused to be corrected. You would think they would know how to spell them!
English is an odd language. You can spell rather poorly and even stuff up the grammar, but as long as it isn't absolutely awful, you have a shot at being understood (and understood as intended, at that). Sort of makes up for the fact that English is likely one of the, if not the most, difficult languages to learn in the world.
I mean, obviously if your spelling and grammar are poor, you may not be respected as such depending on the context......
There aren't many other languages where you can stuff up spelling and/or grammar (or tone or pronunciation, as applicable) and suddenly you cannot be understood at all, or you say absolutely the completely wrong thing.
Microsoft has a lot of answer for with spell check which (at least on our office system) corrects the perfectly correct "advice" (noun) to "advise" and "licence" to "license". People who don't know any better believe that spell check is correct.
Maybe they do, but people rely too much on the spelling (or worse, grammar) checker. I especially cringe when they start the spell & replace function (i.e. the function which scans the entire document for errors, then automatically replaces them with the most popular correction).
Whether or not the spell checker gets it wrong - and yes it's been known to do that - is no excuse to attempt to shift the responsibility away from the author.
One I don't like is "invite" used as a noun instead of "invitation", but I think I am barking up a brick wall on my own with that.
I believe that might be a habit borne from social media, instant messaging or the like, where the function to add another contact or what not was called "Invite" (or "Invite..."), thus it was thrown around as such in conversation to be consistent with the exact text of the command, even though you are right that "invitation" (i.e. "just send me an invitation to join...") is the correct word.
Glass houses and all that...but, ...
That's a tough one. I'm not perfect at grammar and spelling (still make mistakes and wouldn't be surprised if I've made some even within this thread), but does that mean we don't have the right to point out what is clearly a mistake or not?
Not having a go at you, because people will frequently use that as an "excuse" to cover up their own "inability" (or insecurity). One reason why "Grammar naz_" is popularised, and you can see - especially on article comments (on blogs, news sites, etc.) - that if anyone attempts to correct grammar, especially for the purposes of attacking the original poster, there will be a large vitriolic follow-up to that correcting post. It would seem that adopting an even ludicrous position which is counter to the author would attract less attention than pointing out one's grammar.
Which underscores the "point" - grammar (and spelling) seems to matter little in popular society now, as long as you can get your message across.
) about this as there were several children in the class who had learning issues. Not good enough. If people can't spell that's their issue but to think they are teaching their students the same errors! 
