I am not aware of any Amazon or other usage policy regulating the use of this file.
The highlights are excerpts (quotes) from the book's content, so the copyright to those excerpts belongs to whoever owns the copyright of the content of the book.
However, in most jurisdictions there are exceptions to copyright law that let you do a lot with quotes/excerpts ...
tl;dr This depends on what you mean by DRM, but generally the answer is no.
DRM can mean a lot of things, but it's basically a combination of software, file formats, and, in somewhat rare cases, the hardware itself. Unless the hardware and the software have some way to figure out where you are, they can't do anything differently based on your ...
You got me curious, so I started digging through the terms of service. Keep in mind that I am not a lawyer, so anything I say is just my own personal interpretation of the terms.
After reading through who-knows-how-many documents, this is all I could come up with.
The Kindle Store Terms state:
"In addition, you may not bypass, modify, defeat, or ...