Well... you could do that... yeah, you could do that, of course you could! But... why? Look at these people, these human beings; consider their potential! From the day they arrive on the planet, blinking, step into the sun, there is more to see than can ever be seen, more to do than... no, hold on. Sorry, that's The Lion King. But, the point still stands... leave them alone!
~The Doctor, Doctor Who - The Christmas Invasion