Mail

The signal to noise ratio on paper mail is horribly low.  Six bits of noise in the box today and not one signal, especially not the signal I'm waiting for.  People say that if junk email cost money to send there would be less of it, but I get an awful lot of junk paper mail too.  Bill Bryson proposed tearing up their reply card and mailing it back in their own envelope, thus doubling their costs.