Fascinating discussion, the different approaches/views on energy work and of sending energy all have their validity.
First off - at least from my experience - there is a definite difference between on-on-one energy work and energy channeling such as the supernova type AmonRa was describing earlier.
Being a conduit for energy is not something that you can turn on or off - or even control without serious side effects. At the same time, working one-on-one with someone else's energy - especially without their permission - can also have serious side effects. it's like the difference between a waterfall and a water faucet.
The waterfall simply IS, a force of nature, part of what IS. The riverbed that is channeling the flow of water does not ask permission of what's downstream before channeling the force of the river. It simply does what it does, what nature asks it to do.
On the other hand, the water faucet has intent. You intentionally turn the faucet on or off, at a controlled level, and for a specific purpose. The intention is what makes all of the difference - and indicates a line crossed when working with another's energy. Even if you have "scoped out" the situation through your higher self and even though you realize that you are (as AmaonRa said) effectively sending energy from one part of yourself to another part of yourself, not everyone is at the same level of understanding that allows them to realize this. If they are at a point where they can feel energy but are not yet open to the idea of oneness then the preceived intrusion on their individual space can actually hinder the effectiveness of your energy work. In fact, it can even hinder the person's further development as they may tune themselves out to receiving energy of any kind.