I would think it's not a great idea for people to publish elite numbers, but it hardly seems like a cardinal sin. Besides, let's not overstate things here. While a few people at FT might pick it up and use it, it's not like publishing it in the Yellow Pages.
I don't like it when people get so uptight about the possibility of a small number of others "taking away" something they "earned," whether it's Platinum vs. Silver elite or Silver elite vs. no status. It's just petty.