I apologize for the fragmented posts, but this stuff doesn't just come in neat packages.
I have some questions for you.
1) Do you use paper? Do you read papers, send greeting cards, use wrapping paper, read magazines, work in an office...?
Think about the old growth trees that the timber industry clear cut to get paper, or to plant tree farms to harvest it. Do you know what a tree is? It's a little ecosystem with many animals, plants, etc. on, in, and around it. Trees and plants are literally the sustainers of life on earth right behind water and the sun.
I ask you--what are you doing to stop the murder of the trees and all things associated with them?
This goes double for all the wood in your life--furniture, houses, decks, etc.
2) Do you use plastic? Styrofoam? Do you drive a car? What about metals?
Extracting fossil fuels from the earth does so much damage that it's hard to fathom. And that's before BP murders part of the Gulf of Mexico.
Blowing up mountains for your soda cans and aluminum foil, or the cell phones that you upgrade and throw out, or the TV you watch, or the computer that you're on now...
Those things all do TREMENDOUS damage to the earth, yet you are not abstaining from them, nor are you alerting people about the incredible destructiveness of the corporations that make them. For details on this, please see here: http://youtu.be/xAKr9YqPowQ
3) Do you have any idea how catastrophically one human hurts the world? Do you have children? Why do you not rally against them?
Those three points are just the tip of the iceberg, and every step in all of them involves displacing, exploiting, and murdering humans and animals. All of it. Every scintilla of civilization.
What are you doing to stop it?
Not eating animals is not the answer. Indigenous peoples ate animals, and were easily the most efficient people in history with the smallest carbon footprint.
Vegans have too narrow a focus. You need to broaden your perspective and realize that the entire system in place right now is rotten to the core. Factory farming, vivisection, etc. are all symptoms of this problem. By simply abstaining from animals, you may as well try to kick water uphill.
The thing most vegans fail to realize (see my point on indigenous people) is that we are mammals. We consume. Use toilet paper instead of leaves? Heat your house? Drive your car? Of course. Life today is not possible without these things. Our responsibility is to protect the landbase and the environment from which we take what we need. All of our diets--omni, veg, or vegan--are all unsustainable as they stand. They all murder and torture animals. As vegans, we may be doing less harm, but we still have oceans of blood on our hands.
I ask one more time, as I've yet to get a satisfactory answer: what are you going to do about it? What's happening today can only be described as ecocide. If it doesn't stop soon, there won't be any animals left not to eat.