I strongly believe that copying and pasting content is totally fine provided the source of the content is clearly mentioned. The author of the content deserves the attention and applaud if their content is liked and copy-paste worthy.
Owning someone else's content wothout giving them due credit is bad and not acceptable. This is where the proof of brain concept comes into picture. Having a brain is not enough, it depends how you are using it. Uie of brain in the right way has got a lot of worth associated to it.
I think it is totally cool to highlight plagiarised content on the POB community given people come here with their thoughts and minds and write them down. If they are using plagiarised content and somebody is using their content and causing plagirism, it must be stopped. If such people dn't find it worthy dropping by next time, it's absolutely ok.
You are correct.
Plagiarism is only a part of the problem, but it's enough to keep me really busy. The true problem is that not enough people work to stem the tide, unfortunately.