The above link on Africa carry isn't working for me.
I think it's pretty clear, however. Never point the muzzle at anyone, chamber loaded or not. (Exceptions are when a long gun is cased, or, while cleaning or maintaining a gun you sometimes flag yourself with muzzle but that's only after verifying empty / action open or bolt removed.)
I don't see "Africa carry" as being much worse than the style shown at the front of the line in this photo. Maybe a bit worse because Africa carry is higher up and if someone is in front, you're more likely to be flagging their body instead of "just" the leg. Anyway, either method is only safe if you're alone or first in line.
But it seems that African gun safety rules rely more heavily on whether a round is chambered. Presumably this works well enough because PHs don't want anyone to be shot. But I'd prefer if people tried to never point the muzzle at anyone, and to not rest their hand on the muzzle.
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