No, it could not, because the poison was specifically designed to kill rats, and was developed as a rat poison/killer, not a human poison/killer. It would still be considered rat poison, even if the human died from the rat poison.
no geckos can not spit poison!
If the meat of the human is poisoned, and the poison does not cook out in the cooking process. Then the cannibals that ingest the human would also ingest the poison.
poison+weapon poison is snake+weapon(or tools) weapon is tools and human
Yes.
You can die!
No they can't. However they have poison in them and if transferred to a human they can make a person sick.
if you ingest enough of it.
Arsenic
No....
Blue ringed octopuses do have enough poison to kill a human.
poison+weapon poison is snake+weapon(or tools) weapon is tools and human