Perkins' 'leading them by the nose' seems to mean nothing more offensive than simply throwing out plot hooks, which I'd think all GMs should be doing all the time anyway.
I'm not exactly sure about 'never leading them into a trap' - certainly my hostile NPCs may attempt to lead the PCs into a trap, but this will be an emergent property of gameplay, typically in response to prior player actions. If it's a completely arbitrary 'bolt from the blue' trap without foundation in prior events (you're at the inn, when werewolves attack!) then I would tend to make it a CR-balanced, but if it's a response to prior PC action that won't necessarily be the case.