Rik, you should be a politician - answer a question with a question....
Seriously, most of my sea fishing is done on a opportunist basis so I tend to buy bait when I arrive. As fresh lug is not always available, I often end up with frozen stuff (not as good as the fresh). Using a hook like an Aberdeen, you can thread the worm up the hook, up the line and as the snood is amnesia, there is quite a bulky knot, wich stops the worm slipping down. But I'm only using a small piece of worm, usually shore or estuary fishing for small flatties and so on.
Sea bait is so expensive, I couldn't possibly bar the thought of putting 4 worms on in one go...but then again that's me...To be honest, most of my sea fishing is real fun, I don't have the same 'seriousness' as I do with my coarse fishing.