Thankfully this hasn't happened to me... YET... but I can totally understand the benefits of having an unplugged wedding. Not just for the sake of the professional photographs but also as a bride and groom wanting your guests to be exactly that... guests.
Firstly I'll explain what an unplugged wedding is... Unplugged from phones, cameras, iPads and other technical devices that people seem to not be able to go without for more than 5 minutes.
There are some great reasons why to do this and the first reason for myself, as a wedding photographer, is to avoid your guests ruining your photos. I've read too many times on photography forums and groups I belong to how a guest ruined the most important shot of the day.
Guests jumping out of their seats and into the aisle just as you go to take a photo of the couple but instead you take a great photo of this random person standing in front of the bride and groom.
Or when a guest decides to take a photo and the flash goes off the same time as the professional photographer takes the photo (most wedding photographers, myself included, try not to use a flash for wedding photography) so the professional photo is now utterly over exposed...
There are more reasons for you to choose an unplugged wedding than just to save the professional photographs (which remember you are paying to have taken).
Asking your guests to put away the phones, camera's and iPads means that they will be focused on you and your wedding. They get to relax for a moment, switch off and enjoy watching two people they love get married. Rather than watching this through a camera they get to experience it and I guarantee will enjoy it more... and remember it more.
I'm not saying that people shouldn't take their cameras to a wedding (infact its lovely to have moments captured by guests that the professional photographer wont be taking)... I am saying that during the ceremony let the photographer capture the moment. That is what the bridal couple are paying them for after all. So as a guest... sit back and relax. Grab a photo after the ceremony or at the reception... there is plenty of time.
And if you're a bride to be then maybe this is something you should consider.