Of course not, it’s your wedding after all! I’ve no issues with guests taking their own photographs during your wedding; it’s common practice these days anyway with so many camera phones around, and I will always try to accommodate opportunities for your guests by being as unobtrusive as possible.
However, there is the growing practice; that of an ‘unplugged wedding’. This is where a couple will ask and encourage their guests to put their cameras and phones away for the day to enjoy the day through their eyes and not a screen or lens!
I’ve had feedback from this kind of wedding where guests have enjoyed the day more, and have had increased excited anticipation to see the official photographs. It’s also a scientific fact that a person will remember more by looking through their own eyes then via a phone screen!
I say leave it to the professionals and enjoy the day, but at the end of the day though, it is totally up to you.