Hemp seed protein contains all of the essential amino acids and hemp benefits include being the most digestible protein in the plant world.
The benefits of hemp also include being a non-allergenic food and hemp is also gluten free. Hemp benefits definitely outweigh the problems of consuming a highly allergenic food like soy.
I think hemp seeds can be an important and maybe even necessary addition to a vegan diet - especially a raw vegan diet.
Not only does it supply the essential amino acids, but supplies essential fatty acids like omega 6 and omega 3 in a pretty good ratio.
However, hemp seed protein only supplies the plant based version of omega 3 and omega 6 fatty acids which needs to be converted by your body (and that's if you can) into the more powerful forms of these fatty acids - like DHA.
It does appear to be a lot safer than any soybean protein and I would definitely use hemp milk instead of soy milk.
It's also a very versatile protein and can be used in a shake, smoothie, or you can even make dehydrated foods using this seed.
I've tried hemp seeds and I have to say that I really wasn't very attached to the taste or feeling it gave me. It just didn't feel any where near the vicinity of what I get from animal protein.
However, I can see using some hemp seeds as an addition to my meals. I personally would not rely on it to supply me with my protein requirements - it would be used more like an additive to help give my salad an interesting crunch or texture.