Whatever those people are describing as having escaped in their houses, they are not what we refer to as spring tails. They are likely referring to Silverfish or Bristletails - completely different and unrelated animals. I personally wouldn't bother with spring tails in a tree frog terrarium - the frogs are too big to be interested in eating them, so the spring tails will be little more than a stressor (because they will climb on the frogs when the frogs are on the substrate).