I observed most forum users access the forum and make post using phone. When typing with phone and the phone is in dictionary mode, it guess and change typed words easily. During the process, words typed may be changed without the you knowing about it. This make it good for one to cross- check your write- up before posting.
Yes you're right, if a user uses a smartphone to make a post, maybe it will also affect the posts they make, such as being a bit messy in format and errors in grammar because of the limited view on a smartphone. It's different when we do it on a computer or laptop, so it's more flexible than viewpoints and easy to type, edit and check back on our posts.
Then one of the other inhibiting factors is that these users are not people who usually use English as their dominant or main language. They only rely on google translate to translate from their local language and sometimes the translation is a bit messy and doesn't fit.
And rush is also one of the problems that can make the posts we provide not conveyed properly. If it turns out that our post has something wrong, then we can still edit it, but as long as we don't always making mistakes that's normal.
One more thing, if there is someone who tries to remind us to correct our mistakes, we should not think that they are hostile to us, but think that it is a criticism that we receive.