xyrandomyx
Contributor
As one who worked for and strongly supported marine protected areas (MPAs) here in the state of California, I would actually have to disagree somewhat. I think divers should do what they can to educate those who would take from such sites but I think the way to go about this is to get effective networks of MPAs established in your area. We treated the Casino Point Dive Park as a de facto MPA for decades (I actually thought it was initially). Fortunately city ordinance prevents spearfishing in city waters and the boundary line around the park prevents fishing at least from boats. Fishing from the breakwater on the park's shore was legal, but we could ask people to stop due to the safety issue of possibly hooking divers.
Work to create an effective network of MPAs wherever you are. I would love to see about 30% of our ocean shoreline so protected, both to preserve sanctuaries where fish and inverts can survive and to better ensure spillover into adjacent areas where those who take can also benefit.
An MPA seems the best approach to me. One of the stated goal of South Africa's MPAs is the 'the reduction of user-conflict' -- clearly something to aim for in this case too.