It's not their fault you broke your CPU. Just be more careful. I do think they should make some way to protect the core though.
I popped the top casing off my old K6-2/300. Have never had any problems with it, it's still running fine, even though the corners are chipped from getting the heatsink on there at odd angles. I can't believe it still works, but it does. The K6-2 must have more space inbetween the edges and actual circuitry than the Athlon does.