I tend to agree with you, Nick, but if somebody wants to have a little fun with a poll, where's the harm? If I don't find it relevant or have nothing to add, I don't participate. To paraphrase the great sage, if we don't want to vote, how are they going to stop us?
Personally, I see no point in ranking such as these, or choosing a favorite, but I think the objective is to promote discussion. The author of this thread, whose English is a bit limited (but far better than my Spanish), is doing his best to do just that. If divvying everything up into age groups seems a bit naive, still there's no harm in it. And cheer up, he'll run out of numbers soon!