Aww...not all teens are SneakyPetes. In fact I think my teens and their friends are far better teens than I was, way back when. Any crowd of teens, especially those heavy on the boys, seems to garner a winced eye and a clutched purse, but I haven't heard of anything serious going on in the south end. "SoWal Hoodlums" and "SoWal Crime" is really pretty dang wimpy. No street cred at all for the Sea Turtles. As an insider, I've seen far more lushy/douchy activity from the high society crowd down here than I have teens (hint: high class vomit in a $1000 a night home is still vomit), so, I don't agree that if you build it -- a public access -- it will draw a bad element. If you have a problem with litter or behavior, that's what the police are for. As Richard Ford wrote (paraphrased): you can't regret in advance and call it prudence. It's unfair to speculate that access equals deliquency and block a facility that a large majority would enjoy just to prevent even the possibility of inconvenience.
The fact is that SoWal is a destination because it's lively and fun. Sure it's beautiful, but there are plenty of other beautiful areas that don't have the vacation cache that SoWal does. Lively and fun means people. People mean problems. People also mean money. Reality is, SoWal cannot support it's businesses (or grow businesses that provide locals with conveniences) without an influx of cash from non-residents and non-owners. So it isn't enough just to tolerate off-beach locals and off-beach vacation renters, you have to ATTRACT them, even if that seems counter-intuitive.