Earth Hour
Well, if it would be so damn easy to safe the planet, why will they limit their planet-saving to only 60 minutes and switch on the light afterwards again? Why won't they choose to sit in the dark for the rest of their self-righteous lifes - let's say live without electricity for the next 60 years??
The second when the light will be switched on after one hour of darkness demonstrates how pointless and stupid this whole activity is: "WTF, it's too damn dark, 60 minutes of planet-saving is enough, who gives a fuck about the planet - let there be LIGHT!!"
Yep, dear inconsequent environmental activists, you apparently really thought this through, didn't you?