Let me give you a rundown of how this would work out.

"5UP34-1337: Gimme a 300 ATK hero or die!
Niemand: FFFFFFFFFUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU..."

I'd rather watch both my cities burn than roll over and play dead. At least it would be more interesting if I put up a fight.