Our broiler "ruins" pans when we use it
General advice, any time you're cooking something that is going to become one with the pan under high heat, cover the pan with foil before you put the stuff on it.

As another possibility you can buy a stoneware baking sheet. They season more like cast iron, so burned on fat is fine. Or you could just use cast iron...It's pretty much impossible to get something permanently stuck to cast iron, unless you were using it as a crucible to melt silver or something...