The question has been closed and will be deleted soon.
But they way that user has been commenting, I am not sure they understand how Stack Overflow and the SE work:
Cool, i didn't knew that questions have copyrights.Beautiful, now do you think you are the only people in the planet wondering that? – slash28cu 4 mins ago
How do we make users understand they are wrong?
Deleting the question might just antagonize them to do it again and/or go on a downvoting rampage, especially since the user sees that they get all their rep back when the question is deleted.
What is the correct way to deal with such a user if it gets to that point?