Let me share my gladware story: (only this one was my fault)
I've only used it a few times to bake lasagna in. This last time I ruined our dinner, but it was my own doing. I placed a piece of foil over the top of it for the first 30 minutes of baking and then forgot to take off the foil for the last 15 minutes. I wanted the cheese to brown a little, so I took the foil off and thought a few minutes with the broiler on would do the trick.
What the heck was I thinking ???!!! I swear my parents raised me to be smarter than that, but I didn't show it. I walked back into the kitchen and heard some crackling noises, turned the oven light on and well, lets just say I almost had a mess. Thankfully I had the pan on an old cookie sheet that I was tired of anyway.
We had some leftovers that night in place of the lasagna. Me and hubby are still laughing about that one. I think this tops the two times I forgot to take the cardboard off of the bottoms of the Digorno frozen pizzas.