in HCL, my 5th lvl Barb was wearing a neckless that had Proof
against poison +2 (immunity from natural poisons and +2 against non-natural poisons)

got bit by a spider in splinterskull,
(drum roll please .... and was poisoned.) So I checked
the poison effect because a thought that regular spider
poison was natural and I should be immune.
YUP, said it was natural.

So proof against poison is really proof against nothing.

I think that perhaps SSG should fix the poison/disease system
so that proof against poison or disease actually
works against the poisons and diseases they are supposed to work against.

maybe take a break from pumping out new stuff for a few months and actually
fix all the broken stuff ???

or is that too much to ask?