I don't think I see it the same way. Honestly it doesn't bother me at all when casual players throw from OB, as long as they shanked OB, and didn't play to that spot intentionally. I do see OB as our best attempt to protect non-golfer pedestrians from throws off the tee. AND, for players that want the game to be competitive, it adds a welcome element of difficulty. I think it IS possible for players to play safely, and not follow OB rules. To me, it's there to deter someone from throwing into a dangerous area, but some players simply do not have the control to execute that plan. I really believe that most players acknowledge OB exists and try to land their shot in bounds. If someone is not playing for score - just having a casual walk in the park and throwing at targets - I think it's unreasonable to expect them to pick up the disc, get back in bounds, and throw again if their OB position is clear of danger. I'm all about getting on someone if they are putting others at risk. But from what I've seen, most throws from out of an OB area are not unsafe shots. If OB was there exclusively for safety, we wouldn't have hole 3's fairway running directly down an OB path where pedestrians can emerge from Fulton at any point. I throw that shot all the time, and I know it's not totally safe. I do what I can to make sure my line is clear of hazards to make it safe as possible, and I think most casual players do that when they play shots back in bounds from OB. (side note: if the course design was exclusively about safety, we'd have a mando left of the first tree on hole three, right?)
I played for a solid year with one disc, a general disregard for OB, and counted any shot that hit metal as being holed out. Metal anywhere, even the lock at the base of the pole. I had fun every time. At the time, I was definitely bothered by anyone preaching to me about the way I played the game incorrectly, as I was not infringing on their own fun. It definitely came across as pretentiousness. There are pdga rules, and I now choose to follow them, but this course is not owned by the pdga. It's a public park where people go to have fun. If pdga rules made the game more fun to them, they'd play that way. Most casual players are not at a point where they are seeking that level of competition. I think there's a right way to encourage players to play safely, and inform them of course design if they clearly do not understand the game. But there is a way to do this without passing judgment or becoming the rules police that discourages new players from developing their game at their own pace. If you are well intentioned and genuinely friendly when you approach someone, it will show. If you approach someone because you are pissed off and judgmental about them playing from OB, that will show too.
Are there really course rules? Or are they more like guidelines? Anyone can throw a disc in the park just about anywhere they want, right? Couldn't we go play catch with a lid in the pedestrian-filled plaza between the De Young and Academy of Sciences? I think you can encourage someone to play safely, without infringing on their fun. Let people have fun - that's how the sport grows, and that's what sucked me in. I think we should lead by example, not by lecturing. Safety above all, of course. But I think this sport grows more from people getting hooked and evolving into competitive players because they are having fun, and less from trying to forcefully impose the professional, respected image that many of us want.