if you're expecting to enlighten people about communism, or another form of economy, criticizing one that is just as flawed isn't such a grand idea. Capitalism works just as well as Communism, both are very flawed at their core. The base Idea in Capitalism is that of Economic Survival of the fittest, the working class will be tramped and will eventually lead to a rebellion that will either end in a toppling of the ruling class or new rights for workers. In Communism it's the opposite, the individual is trampled and looks for ways to put themselves above, and if allowed eventually will convince more capitalism is a good idea, and unless democracy comes into play it will continue in a vicious cycle. Democracy is what truely allows a country to stay weighed in a kind of economic system, as long as the general populace is happy then a rebellion is most likely stayed. By no means does this mean that Democracy is the only way, bear in mind that Stalinistic Communism is very popular, as it allows people to get more from a paycheck than others, just keeps it in check so the difference isn't so varied. Just like American Capitalism isn't bad either, due to democracy for the most part. In a basic capitalist system the lower class is owned and disregarded easily. Socialism is probably the best way to go about things, adding a fine mix, allowing personal freedoms (Capitalism), but also regulating the economy so as to avoid market crashes and economic degredation (Communism). Unfortunately many people have developed a negative stigmatism to Communism due to popular media.
Edit: Dale makes a wonderful point about the checks and balances, if you don't believe him, or maybe before even posting here you should all read something called "The Federalist Papers". They're quite interesting and informative