Yeah, some AMA sanctioned fields really dislike drones, or so I've found.
The big problem seems to be "Drones have cameras" and that alone annoys people. Maybe the same as driving down the road and someone with a huge camera photographs you, your family, and your car as you drive by which makes you wonder "Why?" or it just makes you mad. Newspaper photographer was shooting people at a park on a holiday picnic for the paper and a woman told him to stop and then sent her families goons over who beat him up and threw his newspaper's camera into the lake.
One AMA field is located on the City's Park Dept. land so they can and do make rules for its operation to the AMA field's club president. Club has to abide by the City Parks Dept. rules or lose the flying field. Problem was the new drone folk began flying away from the field (BVLOS, and the flying field's posted rules regarding no overflights of critical infrastructure and the U.S. Army Corp of Engineer's dam area.) and they started chasing boaters and water skiers around the nearby lake which was also controlled by the City Park's Dept. In time, drones became a no-no there unless you were grandfathered in under having a normal RC aircraft and flying it by their rules.
Don't know where all this is heading, but it seems to be getting more confined everyday rather than the opposite.