Guardian: "reducing our emissions might just save humanity from a pre-emptive alien attack"

Here is the reasoning:

It may not rank as the most compelling reason to curb greenhouse gases, but reducing our emissions might just save humanity from a pre-emptive alien attack, scientists claim.

Watching from afar, extraterrestrial beings might view changes in Earth's atmosphere as symptomatic of a civilisation growing out of control – and take drastic action to keep us from becoming a more serious threat, the researchers explain. [...]

I thought that global warming itself is a threat to humanity. Wouldn't it be possible that global warming could save us from pre-emptive attack? The aliens might be worried about our eventual technological capability, but they might conclude, "Fortunately, it is unnecessary to take any action--they aren't going to survive the global warming hurdle." The best survival strategy might be to wait as long as possible before acting on global warming. If we can veer into safety at the last moment, by that time we might be advanced enough to deal with a bunch of Gore-brained Science-wimp aliens and their puny sustainable plug-in hybrid Prius star-fleet. It is evidently very important not to build any new bicycle lanes. (h/t: memeorandum)