Years back, when my son was on the high school golf circuit, he earned his way into an event at famed Colonial over in Ft.Worth, and I went out to watch. His opponent behaved similarly, including throwing clubs, laying down on the ground and pounding his fist over missed putts, etc. The coup de grace was him accusing my son of mis scoring him. First, its hard to know how many penalties he incurred, but I know he broke many rules, like giving himself putts, and my son counted the actual number. Filed a formal protest and all, and so I got a bit involved at the end as perhaps my son's rep in the golf community would be affected by this kid's performance.
Thoroughly ruined my day, my son's day, and anyone else who was watching. It was awkward, in not knowing if I should report a fellow junior golfer or not.
Given golf's grand traditions, that woman ought to be severaly chastised, suspended, whatever to nip any behavior like that in the bud at that level.