Jelby, how would those guidelines cover uploads of books not in the library? I don't know if you followed the argument in this thread
https://www.mobileread.com/forums/sho...d.php?t=236430
which turned from the gentle mocking of EbookNovice who appeared to be paranoid about altered books, into the more serious question of uploaders who deliberately alter uploaded books. For example, one person admitted that they'd changed the word 'gay' to 'light-hearted' in order to convey the intended meaning, thereby insulting the reader's intelligence. This book was uploaded to the MR library.
So this isn't just a theoretical matter, it does happen, so uploading guidelines covering this would be very useful and reassuring.