I too have read the links, but they are 7 yrs old, times have changed.
The original culprit was the long shank nailer, it had potential to double hook, i believe these are banned at most fisheries nationally.
The shorter curve shank now used in whatever rig type is not outlawed anywhere i know off.
a c&p from the nutrabaits website;
The Alternative 360
Our Alternative Hookbait range of pop-ups hookbaits is ideal for fishing the 360 Degree rig. This rig is usually set up using a long curved shank hook like the long shank Nailer. However, of late concern has been voiced about the potential for mouth damage with these types of hook so you may like to know that the rig works equally well with many other hook patters. One of my most effective rigs and baits over the past three years has been the 360 fished with a 10mm Pink Pepper or 10mm Pineapple and Butyric pop up. Instead of the usual long curved shank hook I have been using a size 4 Fox SSC hook and this has worked a treat with a 360 Degree set-up.