Either make Kuru less deadly, or make Prions harder to get.

[Marquesas]

Basically: Kuru was the problem, not spider eggs/gibbis/nanomachines.

Look at it this way: 5 units of most of the other poisons are usually enough to kill or at least severely debilitate people. This change brings all poisons to roughly the same deadliness.

I am also torn on the subject of nanites. I will consider this but won't promise anything.