Corporations

Although proudly enamoured by the beauty of free markets, I try not to fall into the trap of blindly defending any private firm. Corporations can be evil, vile and worth throwing bricks over. But to me, they're not geniune. They gain their power and corruption from their ability to obtain political influence, and this is an assault on freedom.
Norberg wonderfully encapsulates my views on corporations:

By capitalism I do not specifically mean an economic system of capital ownership and investment opportunities. Those things can also exist in a command economy. What I mean is the liberal market economy, with free competition based on the right to use one’s property and the freedom to negotiate, to conclude agreements, and to start up business opportunities. What I am defending then, is individual liberty in the economy. Capitalists are dangerous when, instead of seeking profit through competition, they join forces with the government. If the state is a dictatorship, corporations can easily be parties to human rights violation, as a number of Western oil companies have been in African states. By the same token, capitalists who stalk the corridors of political power in search of benefits and privileges are not true capitalists. On the contrary, they are a threat to the fee market and as such must be criticized and counteracted. Often, businessmen want to play politics, and politicians want to play at being businessmen. That is not a market economy; it is a mixed economy in which entrepreneurs and politicians have confused their roles. Free capitalist exists when politicians pursue liberal policies and entrepreneurs do business.

--Johan Norberg, In Defense of Global Capitalism

Also, I think Steve's post called Won Ton or Burgers is particularly relevant.