Yeah Dan, I handle my tarantulas on ocassion, if the hairs would burn on contact, I'd have noticed. I also had a really foul mooded smithi that kept launching hairs at me, those burned alot.
Sure, watching two predators battle it out can seem intresting. But in most cases, there is no winner. Especially when dealing with animals that are toxic, the pacman frog would most likely win, unless it's a goliath or a similar big one, but after eating, the pacman would succumb to the poison.
I've once seen a video of a goliath battling a scorpion and I found it rather sickening.