Javier Mascherano, Argentina
The midfielder once earned a red card for kicking the driver of a medical cart. As if that's not bad enough, here's how he explained his actions after the fact: "The cart was going too quickly, I was moving around and thought I might fall. We told the medic to go slower, he ignored me and I reacted." He’s going to get booed in Brazil anyway so you can just go ahead and bandwagon hate him.