Lobsters are long-lived, advanced crustaceans and I welcome treating them as well as possible under the circumstances. But just from the experiment as recounted

Lobsters are long-lived, advanced crustaceans and I welcome treating them as well as possible under the circumstances. But just from the experiment as recounted in the post (crabs leave a burrow to avoid electric shocks) I don't think it's necessarily clear what sort of sensations they are exposed to due to the boiling. I once heard a well-known ethologist (and animal welfare advocate) argue that since the crustaceans have not evolved with fire and other extreme temperatures as a common hazard, they don't have the same sort of sensory responses to it as terrestrial animals. They leave areas with temperatures which are harmfully high for them, but the experience for them may be more akin to us seeking shade on a too hot day than us being scalded. So cooking may actually be a comparatively humane way of killing them. If better data about the crustacean minds contradicts that, his assessment needs to be updated, of course, but just from what we see from the BBC I'm not convinced that is the case.