The Texas Alcoholic Beverage Commission suspended its raids this week on bars where they were arresting people for public drunkenness. Not outside the bars, but in them. This isn't acceptable behavior anywhere, but it's particularly sinful in Texas, where alcohol is such a treasured right you can buy it at drive-throughs. (Along with ammunition.) In the press storm following the start of these raids, ABC spokeswoman Carolyn Beck commented on the hate mail the office was receiving: "I don't really understand the hateful outrage. I don't understand, 'Die in a fire.'"
Since then, it's become a new Fark cliche. Headlines include "Linux to Real Networks: Die in a fire", "Scientists to creationists: Die in a fire", "Senate to House: 'Die in a fire'". It's commonly used in places where "Suck it" is also acceptable.
It cracks me up that someone took the time to send a message to the Texas ABC, and the best insult they could come up with was to hope the reader would... die in a fire.