I would think any poisonous campfire would be quickly noticeable (who the hell likes to breathe campfire smoke?) and you would have to actually ingest the toxin

I would think any poisonous campfire would be quickly noticeable (who the hell likes to breathe campfire smoke?) and you would have to actually ingest the toxin like the guys who drank poisoned coffee. https://www.atlasobscura.com/articles/how-a-deadly-camping-trip-revealed-an-arms-race-between-snakes-and-newts https://www.atlasobscura.com/articles/how-a-deadly-camping-t...