Im not really sure how safety can ever be an issue with disc golf... Just pay attention. Can you imagine getting hit with a bad drive in ball golf?? That could kill, but you dont see them hitting tennis balls(or whatever would be softer) around do you?
valid points, but ball golf doesn't share courses with public parks. the idea is based in safety and might be protecting more than just our fellow golfers.
disc golf does not have design standards in place for course design and holes can be laid out in a dangerous pattern that might not allow players to "look out". i have played many mickey mouse courses like this that can be quite dangerous no matter how aware you are of your surroundings.