[accidentalROLLER]

Drinking is not illegal in all parks.
If this incident involved just drinking, it would be a double standard. Most golf courses allow drinking and cute chicks will even bring alcohol to you on the course. Drugs are another issue.
Typically, the substance being consumed is not the issue, its the people using them. If you are smoking pot in the parking lot or selling cocaine, you deserve to be arrested, disc golfer or not.