Why do you care? ...It infuses meaning into forgotten holidays...
Not sure. Probably because I'm cantankerous and people annoy me. If you want to start a tradition to not eat sugary sweets on Halloween, be my guest. Why does everything have to be a movement these days? Plus, the whole "green" thing is already being diluted to the hilt by the marketing machine. It's pretty much the next "extreme." Not to mention, this is only green in the loosest sense of the idea.
I know Halloween isn't as hot as the Autumn Equinox these days, but I wouldn't quite say forgotten.