I'm sorry, but this is absolutely terrible advice. They'd be better off just asking all the guests to email them all the snapshots they took with their point-and-shoots, because it'll be on par with the quality that they'll get from someone who doesn't know what they're doing. Granted, if the couple couldn't give two craps about photos of them and their wedding, then skimp away; but otherwise, photography is one of the last places that one should look to save money with a wedding. A DSLR doesn't make someone a good photographer, and taking pictures of a wedding doesn't make someone a wedding photographer. Wedding photography is not for the faint-of-heart or the inexperienced, and that's why professionals cost [and are worth] a lot of money. I have had 5 or more friends (and my wife and I) use a friend to take pictures and I would match our pictures up against one's done by a professional. You want to test them out and see how they do, we had a friend do engagement pictures first. maybe you have seen it go poorly but everyone of our friends who did it has been really happy. So no it is not terrible advice, but you have to have a friend who has a good eye for photography.