So how about having a bunch of willing volunteers to act as Discipline Lane Marshals?
They could coach the novices on kneelers and standers.
They could enforce the rules on the experienced (so should know better!) shooters
e.g. kneelers with way to much support from a bean bag i.e. not just keeping the knee clean.
Not every competition but for those clubs willing to try something new and send feedback as to the outcomes?