The last warning on your list is the most important one, any form of plagiarism on this forum can't be forgiven, you will instantly get yourself painted with red trust if you engage in the act of plagiarism on this forum, the fault is on newbies not ready to read first before using the forum.
I think people mostly get a temp ban for plagiarism if I'm not wrong, so it is not only getting negative trust but a user plagiarizing will lose their account as well. And I just wonder how lazy one can be when he simply just copies something that has been written by someone and pastes it making minor changes or in some cases, with no changes at all.
It's a shame if you are caught plagiarizing others' content and claiming it's your own. Even those having English as their second language do their best to at least write things themselves no matter how difficult it can get for them. Besides, one can simply use writing tools such as Grammarly that can assist them with mistakes and errors within their writing.