I've heard a lot of reference to it being deadly, but I've been unable to find a specific case study to that effect.
I know for certain that it can give you diarrhea if uncooked. That you haven't gotten sick may be true, but I do not condone eating it without at least one parboil.
It's a free country. You can do what you want, but I think it's unwise.
Back to it causing death, those it would kill would probably not be healthy adults. People with immunosuppression, especially organ function problems, would really be putting their lives in jeopardy eating underprepared pokeweed.
In addition, I'm of the opinion it could really cause fetal problems and very possibly fetal death if consumed by pregnant women.