I can compress the barb back towards the shank with my thumb on those VMC Siwash hooks. That's why I don't use them any more
In fact, I'm down on Siwash hooks generally. Mustad stainless are brittle, and the tinned Mustads aren't what they used to be. I'm using Mustad O'Shaugnessies with a HD ring for a single lure hook.