Rats in the walls

"Why are they doing this Grandma?"

"Oh, deary. They don't understand."

"But they've come from space!"

"I know darling. But that doesn't necessarily mean that they understand the damage they're doing to us, to the world. To them, they've just moved into a new house and they want to make some changes."

"But we were here first."

"We're just rats in the walls dearest."

"But we tried to talk to them..."

"I know. But would you talk to the rats in the walls of your house? They're not interested. The problem with rats though... They all have very big teeth..."