Originally Posted by ProfCrash
Yes it does matter. I won't strip a DRm from a book because I believe it to be illegal. If it is legal then I can check out library books on my Kindle by stripping the DRM.
If you have an account at the library and strip the drm, read the book on your kindle, then delete the drm-free copy, I really don't see an issue.
If you keep the copy or as someone else posted, share it with 50,000 of your closest friends, then yes it is illegal.