Some people have a lot of bigger life problems then plagiarism, so they react on part of your post where you say "Plagiarism is one of the worst things in real world". On the other hand this is very big problem in this forum, some users do not understand that copy / pasting other people posts or some article without posting source results in a ban of the account.

I think I've seen the thread where someone ask about plagiarism in relation with different cultures. Although generally speaking stealing other people's work is a bad thing, in some countries plagiarism is not high on the scale of bad social forms of behavior.

Such threads can surely help that some users comprehend what is plagiarism, and that such a way of posting results in banishing of the users accounts.