Allow me to tell a story. It is of a course in Michigan that is going to shortly get pulled. One of the said reasons for the municipality pulling the course was an incident between an entitled disc golfer and some members of the track cross country community.
Apparently, the park is used by the local high school cross country teams on Saturday mornings for cross country meets. A golfer took umbrage at his game being disrupted by this and interfered with some of the competitors and took up his complaint with the coaches/school administrators at the meet. His contention was that the park was a disc golf first area, disc golf occupying the space 7 days a week, sunrise to sunset. He paid taxes and had every right to play where he wanted and when he wanted.
I am sure that you would not interfere with casuals and obviously are not going to get in someones face, but I was hoping this tale would drive home the pitfalls of entitlement. We are, nearly always, in a public park with both casual player and often many more folks. (dog walkers, hikers, bird watchers, picnickers, sunbathers, geocachers, pokemon go'ers....) We need to embrace, respect and accommodate all of these park users. Failing to do so...even one time can cost the park the course.
Casuals in league time are an opportunity here. They are treated great, invited to join, play through and are given royal treatment. We want them as club members, league members and advocates of sportsmanship and fair play.