It's actually an entertaining read and may remind plenty of people of being a frustrated teenager talking smack about the customers at their first job. And I'll be the first to admit that while the customer is always right, the customer is often stupid, petty, condescending and spoiled, driving the average employee to Samuel L. Jackson fits of profanity. The difference between now and then, of course, is that when we were kids, we weren't posting our complaints where the customers (and our bosses) could read them.
We're going to go out on a limb and say McDonald's cuts young Joanna loose. UPDATE: The voice of reason wins out and young Joanna removed her list and apologized to the McDonald's Talk livejournal community. For anyone still interested in the list, The Consumerist has rescued it.