I wasn't sure about posted this as it seems like sharing something I don't think should be shared. It's already public though and anyone looking for such things would find it so I guess I can.
It's news to me that in SA the names and date of birth of people under firearms prohibition orders are available on a public register. Here is a direct link from the SA Police website.
[Mod edit: Removed now-dead link]
It doesn't say why the order is in place and I'm while I'm sure the majority of them are deserved we know that at times people can unfairly end up on these kinds of things or the punishment can exceed the crime. That's what I have in mind while thinking about this.
I can't see what they hope to achieve by making this public, I suspect the logic behind this is something along the lines of public safety so someone on under an order doesn't purchase a firearm, but since all legal purchases and transfers go through licensed dealers anyway there is no point. If a prohibited person applied for either it would get picked up during the application/permit process, making the public display pointless.
It only serves to demonize the people on the list as far as I can tell.