You can find a lot of people worth hating at (The Customer Is) Not Always Right.
This is a collection of all-too-believable interactions that employees have had with customers. Many of them are, as the banner advertises, stupid and funny. But buried (not too deeply) among the hilarity and stupidity are some of the core psychological problems that just scrape my scabs. It won't take you long to find interactions with people who believe that the world should fit itself to them; that anything that inconveniences them in any way is stupid and unnecessary at best and, at worst, is a violation of their rights.
I wish the sense of entitlement among some of these people (which I will now refer to as "self-centered douchebags") was unbelievable, but we see it every day — in TEA party rallies, in Congressional debates, in international politics, at stoplights, where people walk dogs, in the 12 items or less lane. They're everywhere.
Along with the sense of entitlement, these self-centered douchebags never seem to recognize the possibility, no matter how minute, that they could be wrong. And that's sometimes worse. These are the douchebags who rear-end you and then insist that you stopped too suddenly; the douchebags who buy a vacuum cleaner, use it for a month, and then return it for a full refund because it completely lost suction because they never cleaned the filters; the douchebags who "buy" a ginormous, flat-screen HDTV the day before the Super Bowl and then try to return it the day after and see nothing wrong with that.