It is a part of the experience for many guests and they will be uncomfortable not to. Even though I am a huge fan of “unplugged” weddings (when bride and groom are requesting the guests to be present at the ceremony and not to use their mobile devices), I understand that it is becoming a norm. As long as the guests are not preventing me from capturing critically important moments, such as your first kiss, it is fine with me. Usually it is also helpful to be the only person with the camera during family portraits, as people tend to look at other photographers too, and it gets really hard to take the shoot when everyone is looking at the camera. However, I never had a problem and will just talk to the other person and take turns, if needs be.