#pruning branches

So has anyone ever heard of this type of pruning? I read an article on outdoor growing and obtaining huge yields, like a 10lb plant, that this guy used pistol whipped pruning. Basically it's removing the growth stems and leaving the fan leaves below the canopy so you can power your plant. But I...

So my plants are getting pretty tall and there are a bunch of tiny little branches at the bottom of the plant that will receive little to no real light. My plants are about 18 days into flowering, and I’m wondering if I should prune away those tiny little branches so my plant can put more of...