YANBU OP.
There seems to be a little wankers army of armchair teachers lately, scouring threads so they can pick people up and make themselves feel superior.
The real reason as far as I can see, (behind the fake concern) is that those posters have a problem with reading poor grammar/spelling and simply 'can't' learn to scroll past.
That's their problem to deal with and not the OP's.
Also, I wish MNHQ would come down harder on it. They tend to remove posts when reported but as far as I can see, it's not solving the issue.
I imagine it's very off putting for anyone with poor SPAG who wants to post for advice.
I've said this before but I live in an area where adult and child poverty is rife, domestic violence is rife, alcohol and drug addiction is rife, as is child obesity and housing issues.
If the SPAG police were to see my local Facebook groups, they'd burst a blood vessel because a lot of the posters are poorly educated or have English as a second or third language.
And the sad thing is I've recommended Mumsnet in the past to some of those people and they've said they wouldn't post here due to MNs 'reputation'.
So well played grammar police. Carry on putting women off seeking help, as long as you get to feel superior for a few seconds 