By the time this happens, the human race will be as far removed from where we are now as we are from those tiny mole-like creatures that outlasted the dinosaurs. Assuming we haven't gone completely extinct before that.
Depends on whose morality you're talking about. Settlers from Europe did the "moral" thing and virtually wiped out those pesky pagan natives in the New World. The British did the "moral" thing and sent their convicts to Australia, overwhelming that native population. I suspect that, if we ever achieve the capability of moving out into the galaxy, the "moral" thing to do will involve very similar attitudes.Then again you have to ask yourself, that if this could be done, would this be the correct thing to do morally? Contaminate a virgin world with corrupt minds, war like races, felons of all denominations and sickness. Would it be Mortal survival or New World corruption, contamination and finally distruction? It might be that the unwritten law of the universe is for all life to live and perishon on the same planet.