One of the employees on the local Parks and rec dept, who is also a member of the same volunteer FD as me knows I'm involved with the club.
After a particular busy weekend where the local community centre parking lot was full of trucks and trailers, I was asked to remind people to take these things home with them when they leave the parking lot, and not dump them on the ground beside the trailer.
Apparently there was a few disposable ones left in the parking lot.