You guys have obviously never been bitten by a spider worthy of murder.
I've been bitten by a brown recluse (on the face, while sleeping). I found its smashed remains on my pillow the next morning.
One year later my face was back to normal size with only minor scarring.
KILL 'EM ALL!!! Our house is as much of an SFZ as we can make it! No liberal bug/arachnid policies at Chez Tomorrow.