I was one of three bridesmaids in a wedding last weekend, where the other two were the sister and sister-in-law of the bride. There were three groomsmen, one a brother of the groom and one the brother of the bride, and then the best man, who I had never met before the rehearsal.
The wedding party had their pictures taken first, then the happy couple. The entire wedding party were chatting and having sandwiches, then it was time for family photos. The best man and I were left alone together, and we continued to make small talk finding common interests. He pulled out his cell phone, checked it, then took a photo of me before sliding it back in a different pocket. This was not a situation where there were others taking photos, we weren't goofing around and there wasn't a "silly moment" to capture to share with the others. He didn't ask or say anything other than quietly "just snapped your picture" and I was taken aback, but didn't know what to say.
I have to admit that I felt quite uncomfortable in the moment. I think I got a little quiet then tried to continue chatting. It's been a few days now, and I still feel weird thinking about this guy having my picture on his phone like that. EHell, what would you have done or said?