Food, Inc.
An outstanding documentary from 2008 about the unflattering look inside America's corporate controlled food industry.
They're not saying "don't eat meat" but just to be aware of what you are consuming. The point is that, the government and organizations that are supposed to be keeping us safe, are the ones who are knowingly letting us eat tainted, infected beef, corn, spinach, peanut butter, etc...when you spend money on McDonalds and other things like it, you are continuing to support an incredibly harmful institution. Vegetarian or not, Food, Inc. is a great film.