|There are plenty of highly skilled individuals whose attitudes, ethics, judgment, or interpersonal skills totally undercut their effectiveness and tenure on the job. |
The larger problem is the way she handled this whole incident. Rather than apologizing, she opted for a confrontation by saying that the policy in question is "ridiculous." And by the way, her implication is that you are ridiculous for adhering to it.
She does not realize that policies of previous employers mean nothing, and this is not simply a matter of wear-and-tear on company equipment. By running her manuscript through the copier, she is using company time for personal business, and that is cheating. She is also tying up the copier, causing possible delays for others who have work-related documents that need to be copied.
At the very least, this matter should be documented in her file, and she should know that any further incidents will lead to more severe discipline, up to and including termination. Unless she gets with the program, she is going to be writing her resume as well as her book.