This gets asked at basically every wedding I've been to in the UK i.e. there is a professional photographer, please don't take photos of the bride and groom in the church and it still gets ignored. At my own wedding, one of the guests (not even someone invited to the whole day, just a neighbour of my wife's parents who knew her growing up) is leaning out of the aisle with their phone taking photos ruining a load of photos.
It's incredibly frustrating. I also think it's really strange that when something happens in public, the default isn't to look to see if the person isn't OK anymore, it's to pull out a camera phone and start filming.
It's incredibly frustrating. I also think it's really strange that when something happens in public, the default isn't to look to see if the person isn't OK anymore, it's to pull out a camera phone and start filming.