Thank you for the clarifications.
One of the warnings is in this thread:
https://www.mobileread.com/forums/sho...ry#post3184320
It looks to me like there is more discussion after the moderator post, and nothing was done?
There is also this thread (starting with post 230):
https://www.mobileread.com/forums/sho...ibrary&page=17
I reported the above thread (I think it was this thread) and nothing was done, so I was confused as to what is acceptable (which is why I started this thread).
Maybe another bullet item could be added in the guidelines about DRM and library books?