...would be for humanity to disappear.
I'm sure you've seen this, everyone else has posted it:
That one came from Malkin, but Liberty Belle and Stossel posted it too, as well as Dirtcrasher and US Citizen.
Stossel reminds us of Audi's Green Gestapo TV spot:
And let us not forget that the ultimate goal of the Discover Channel HQ tango JJ Lee last month was the eradication of people from the planet...
Edited to add: Instapundit has other, related, links.
OK, Iowahawk has weighed in.