Mwahahaha!

Depressed? Nihilistic? Evil villain?

http://ned.ucam.org/~sdh31/misc/destroy.html

Destroying the Earth is harder than you may have been led to believe.

You've seen the action movies where the bad guy threatens to destroy the Earth. You've heard people on the news claiming that the next nuclear war or cutting down rainforests or persisting in releasing hideous quantities of pollution into the atmosphere threatens to end the world.

Fools.

The Earth was built to last. It is a 4,550,000,000-year-old, 5,973,600,000,000,000,000,000-tonne ball of iron. It has taken more devastating asteroid hits in its lifetime than you've had hot dinners, and lo, it still orbits merrily. So my first piece of advice to you, dear would-be Earth-destroyer, is: do NOT think this will be easy.

This is not a guide for wusses whose aim is merely to wipe out humanity... This is a guide for those who do not want the Earth to be there anymore.
...
Current Earth-destruction Status
* Number of times the Earth has been destroyed: 0
* Number of plans currently in progress with the final aim of bringing about the Earth's destruction: 0
* Number of scientific experiments currently underway with the potential to bring about the Earth's destruction: 0

Disclaimer: This is a joke. I do not want to destroy the earth, and neither should you. Don't arrest me.