Ladies, I shouldn't have to go here, but I will. Clogging any kind of plumbing with female sanitary waste is a Bad Thing, resulting in backed up toilets, flooded floors, unpumpable porta-privies, etc. Nobody wants to drag their hems through backed up, wet sewage. Nobody wants to use a restroom that's been trashed. Nobody wants to be grossed out because somebody couldn't be bothered to properly dispose of a tampon. No one wants to have to walk to the other side of camp because the nearest facilities are out of order.

Used napkins and tampons should be wrapped in toilet paper and put it in the trash. I know - at some events, there is no trash can near the porta-privy. If you've got room in your pouch for sanitary necessities, you also have room for a small baggie or two to make getting to the trash can a little more pleasant.