It is in the interest of the publishers to confuse plagiarism with copyright. And many people wouldn’t know the difference. So here is a difference between the two:

First, plagiarism is a violation of academic norms but not illegal; copyright violation is illegal, but in truth pretty ubiquitous in academia. (Where did you get that PDF?)
Second, plagiarism is an offence against the author, while copyright violation is an offence against the copyright holder. In traditional academic publishing, they are usually not the same person, due to the ubiquity of copyright transfer agreements (CTAs).
Third, plagiarism applies when ideas are copied, whereas copyright violation occurs only when a specific fixed expression (e.g. sequence of words) is copied.
via Plagiarism is nothing to do with copyright

This would also relate to an earlier post, in making the difference between wrong and illegal. It can be exemplified in this case also.
Suppose for her research person A need a particular research article and she or her institution do not have access to it. What does A do?

Institutional Licensees shall make reasonable efforts to ensure that access to the Licensed
Content is limited to Authorized Users and to protect the Licensed Content from unpermitted use.

This clause essentially makes what happened between A and B illegal and just for sharing this article they might terminate the B’s institutional access to JSTOR. Now we can ask this question that whether the gesture on B’s part to help A was wrong and illegal both? As per definition by JSTOR this is clearly a violation of copyright. But what is the status of A’s research which emerges from this article given by B. Is it illegal? Can it be called as plagiarised (A gives proper citation of course)?

If you apply Kolhberg’s theory of moral development, the person who has the most developed morality will perhaps help the other without bothering about the copyright!

# I will not allow them to chill me

“We want to show the world that we are innovators. We want to show the world that cloud storage has a right to exist. And, of course, when you launch something like this, you can expect some controversy. The content industry is going to react really emotionally about this. The US government will probably try and destroy the new business … you’ve got to stand up against that, and fight that, and I’m doing that … I will not allow them to chill me.”

via Kim Dotcom | guardian

# Aaron Was a Criminal and So Are You

Make no mistake, Aaron was a criminal and, despite popular belief, there was no prosecutorial overreach. The US Attorney who oversaw his prosecution described her office’s actions as “appropriate” and, according to the law, she was telling the truth. The job of prosecutors is to bully and intimidate suspects, using the threat of some of the world’s harshest sentencing laws into plea bargaining for a shorter sentence in exchange for an admission of guilt. This is American “justice;” our current system of severe sentencing and mandatory minimums gives prosecutors overwhelming power – power that was once in the hands of judges and juries – to the point that today less than 5% of criminal cases are resolved by a jury (3% in federal cases).

via Common Dreams.
RIP Aaron Swartz.