The mind boggles! None of mine are planning weddings yet, but I hope to goodness they never hear of anything so utterly tacky and ill-mannered. People keep inventing "new" ways (sneeze into your sleeve -- gross!) to replace perfectly adequate conventions that already exist (handkerchiefs, tissues, sinks). Announcements, people, announcements!
Keep your wedding about your commitment to each other, get over the idea that your *WEDDING* is the Social Event of the Century, have a meaningful ceremony you can afford, and send proper announcements after the fact. Not rocket science.