One way to quit? Try, BEST way to quit... that dude rocks!
Everyone complains about the greed of corporate America and how we are selling ourselves down the river. But how many of you who are complaining shop at Walmart or Target instead of going to a local store and paying more for made in America products? How many of you all eat at McDonald's, or Burger King, or KFC, or whatever big-name fast food company rather than eating at a local diner (where, actually, the food is better and not really more expensive)? These companies are publicly owned and traded. They must answer to their stock-holders, as it should be. And the stock-holders invested in them to make money. I'm not going to berate them for that. That's not to say that there aren't a lot of soulless companies out there. Working in the corporate world really sucks because of the mindless automatons that end up in positions of authority. The truely creative and innovative people are the ones who end up leaving to start their own companies, and the cycle starts all over again.
The bottom line is this: if you're a vehement anti-corporate person, then work for a small company, or start your own company, and do business only with other small companies. If you continue to shop at Walmart and eat at McDonald's all while preaching the downfall of society because of these same corporations, then you really just need to sit down and STFU before you choke on your Big Mac.