Fine, let's try another thought experiment. Let us suppose there is a whole civilization hidden away underwater. They have been hiding from humanity for all these years, centuries even, with highly advanced technology, their justification being "The barbarity of the human race", using such examples such as serial killers, The Vietnam War, and the Nazi deathcamps as examples. People around the world ponder upon how humanity managed to completely look past a whole civilisation, which, to be fair is situated at the bottom of Mariana trench. They then wonder how this whole civilization doesn't affect the environment in any way. The old classroom acronym, MRSGREN, applies to these people. How do they dispose of waste without disrupting the ecosystem,and without becoming part of it? If they were part of our ecosystem, would we be disrupting them? If they were part of the ecosystem, then how would they escape notice? What about their food source? I seriously doubt a sentient organism that simply lived on pure air/ water. Surely we would have seen their source disappearing without trace?(Remembering here, that bees can't live underwater, and that importing bees would likely attract attention).
Other fun questions with this scenario are: If they knew of our history of war and bloodshed, why did they do nothing to stop it? Would it be right for them to interfere? Are they right to be horrified by the actions of the human race? Or are they being too selective? Would we be rude enough as to ask them for technology? Would it be rude? Would it be within our rights to pillage their civilization for technology, if it meant we could make things better for them and us? Would you think it would happen anyway?
Feel free to borrow my thought experiments. I don't mind, honestly.