With:
RedSheep73: You could say 'why are sone people so sensitive'?It's a public place, filled with anonymous strangers. I don't think you should have any expectation that everyone will be nice. It isn't a therapy group.
Yes, some people are a bit nasty. But tone of voice is notoriously difficulf to pick up in writing, and some people will read something as rude when it's just not fluffy and dressed up with waffle.
Also, I think if you are asking for help, you have a pretty strong obligation to get your spelling and grammar right - not doing so is incredibly rude. It really isn't difficult."
and
RedSheep73: "Who wasn't taught spelling or grammar? or was not allowed to read books? this is 2019, not 1919. We've all had the same opportunities, it's just some people can't be arsed. You can easily tell the difference between someone posting in a second language and someone who just can't be arsed."
can we concluded the "strong obligation" doesn't relate to replies? Or maybe RedSheep73 being subtly ironic. If not, it's a shame she didn't explain why, as it would answer the OP.
(Personally I don't care about incorrect SPAG on message boards. (They are rarely so bad it makes the post incomprehensible.) Though in posts critical of others mistakes they are amusing!)