Halloween would be less popular if...people realized just how little fun it is for anybody anymore - kids included.
By the time you're done dealing with: pumpkin bashers, pederast predator warnings, paranoid parents, poisoning scares, political correctness, and anti-Pagan pulpit pounders, who has the energy to enjoy it?
Too bad. It was the only real "just for kid's" holiday there was when I was growing up. Even better than Christmas morning in some respects. (At least with Halloween you didn't have to get "dressed up," "stay neat," and go sit quietly at your relatives' the rest of the day and evening.)