I remember camping as a kid and a community campfire was so much fun: telling ghost stories and roasting s'mores and hotdogs, trying to outrun the smoke, etc. I haven't encountered any in our travels but would join one if we did. It's a great opportunity to meet other campers to see what they find interesting.
Btw, our city banned plastic bags and it is beginning to look much cleaner in parking lots and along the road. Litter is ugly, wildlife pays a price and it isn't that difficult to remember to pack a few canvas/nylon bags when you do your shopping.