Of course not. Demonstrated even MORE immaturity by burning coal. Aliens discussing us: "are the earthlings burning coal for fuel? I thought you said they couldn't even handle nuclear fission?"

"Yes dear Sklaar, it's even worse than we thought. Can you believe where they put the exhaust? Straight into the atmosphere!"

And so it happened that Earth was put into another 1000 years of no-contact-policy at the latest board of review, kids...