Caffeine is toxic at around 10 grams, which is 80-100 cups of coffee. I'd you're defining "toxin" as triggering adverse effects at any dosage, then you need to include water, oxygen, and every other substance in existence.
Alcohol is a biological toxin at any dosage. I find that people who argue this point aren't doing it from an academic standpoint but to justify their own behavior.
Their formatting looked right to me on Jerboa