I think it is generally OK for a person to use a book, hopefully not the blue book, for his or her own reference. It is OK always to use any book, like blue book, if the group is organized around doing so.

It is not OK to hijack a group that does not like them and insist on using them and passing them out and shouting out page numbers. On the other hand, it serves the group right for being so passive about the whole business. mg