Chamois said, "I made no comment on the sources Kate uses..." actually you did Chamois, and this seems to be what the argument is ultimately about. I quote, "Kate and her late dad have always used Credo Reference, formerly Xrefer Plus to set the crosswords."
But all that aside, I fail to see why it is necessary to be so unpleasant and unmannerly just to make a point. We are told that the language is constantly changing and evolving, perhaps even the noun 'antbear' will evolve into something totally unrecognisable by present day lexicographers and compilers of crossword puzzles. Personally, I can't see that it matters one jot.