The E-Snub. (via).

Back in the good old days, people used to duck your phone calls. Or just not return them. But in this, the electronic era, a whole new brand of disdain has come into vogue. The age of the e-snub is upon us. ... Annoying e-mail messages plague all of us, but those of a more legitimate nature are surely deserving of a simple reply. Unfortunately, basic e-courtesy is in short supply. So, having been burned in the past by e-boors, I decided that enough was enough.