Concerns about remixing?

As for using remixing in classroom, educators could think that remixing can be interpreted by students as simply "copying" without need to acquire a deeper knowledge of what they copied. It's the teacher's to evaluate how much the student's project is a real evolution of the original project.

Sometimes students tend to hide the fact that they started from someone else's project. That is why I'm asking my students to develop Scratch-only projects to present to the discussion for their exams. Even if I explain both Scratch and BYOB, I must rely on the incredibly useful ability of the Scratch website of spotting remixes (something that I do not explain to my students :-) I can immediately understand if a project is not by a student, but I must be able to show to the student the original project otherwise... it would be just my opinion.

Remixing is a great way of augmenting knowledge by analysing and building upon what has been already done by others. Without "remixes" (hyperlinks!) the Internet won't be there!