I have to agree with Robyn that it is both irritating and difficult to read anything where the correct spelling, punctuation and grammar are all neglected.
In chatrooms and messengers this can be forgiven to an extent, as it is when holding a verbal conversation with friends. Then we have a visual or tonal clue to the feelings or the other person, and misunderstandings can be avoided. In chat, this can be alleviated by the use of 'smilies' and other well-known abbreviations such as 'LOL' for 'laughs-out-loud' to indicate the remark was not intended to offend.
However, where the article is to be posted in a forum or similar, there is no such excuse. Anyone who is aware they have a problem with spelling can use Word or a similar program to write the piece, correct spelling errors then copy it into a post. TW even has a spell-checker built in! I don't care if the English grammar and spelling used is English, American, Australian or whatever, that is not the issue. Languages evolve, and this is an international site. If English is not your first language, (and we will all make allowances and try an offer constructive criticism), you can still use software to help you out, though I have found those whose first language is English are the often worst offenders.
Punctuation and grammar are a little more difficult ot rectify. The tendency to use 'text' language, with curious and sometimes unintelligible abbreviations, few commas or full stops and often no capitals, is unforgivable. Again, when chat is moving on quickly, well-known 'options' are acceptable.
The most important aspect in writing is the grammar. I have often initially misunderstood or misinterpreted the meaning of a post or reply due to the poor grammar used. If it is something of interest to me I will re-read the article to ensure I believe I have properly understood what the writer is actually saying. Then I can add my own comments secure in the knowledge I am replying to the post, and perhaps not offering praise or criticism where none is due.
I make no claim to be perfect, and do sometimes misspell words, but I do read anything I write thoroughly before and after posting to ensure what I have written is what I meant to say.
Sue. X
Psychiatrists are like the eunuch in the harem. They know what transvestism is, they can describe it, they can demonstrate it, but they cant actually explain it!