Bookmarks should NOT be created unless the first character after # is an alphabetic character. http://zone.ni.com/reference/en-XX/help/371361N-01/lvhowto/manage_tasks_lv/ says "hashtag followed by text is called a bookmark." Although it says # followed by text, it is not only creating them from alphabet characters but also numbers and symbols, e.g. "ID #132", "(###-###-####)". The number of unintended entries in the Bookmark Manager can render the feature almost worthless, especially when upgrading from 2012 or earlier. There are so many non-bookmark values that the presence of any real bookmark (e.g. code to fix) is lost like a needle in a haystack. I know others (e.g. QFang) liberally use "#" in controls, indicators, descriptions, comments, etc. as shorthand for "number" or "number of". There should be few objections since digits and symbols can be in bookmarks after the first character following #.
