I don't think this is worth making a topic on because that someone is a newbie to this forum does not mean he is in primary school. Some newbies here might be PhD holders and professionals in other fields. You don't expect them to drop their communication skills in order to appear like your supposed newbie.
It only become a violation of the forum rules when newbies resort to plagiarism or the use of AI in order to impress people here, apart from that, if the grammar is coming from their head, they are more than welcomed to express themselves and also represent us in the general boards.
This is true besides not everyone can even type well in pidgin. People should express themselves the best way they can. Anyone is free to ask questions or also check the dictionary for the meaning of any grammar they don't understand