ARGH YANBU @BeenThere0 I HATE it. Don't mind having my pic taken if I know it's coming! But not when I am not looking. And yes to people putting photographs on facebook of you that you didn't know were being taken!!! Or NO to it rather!!!
My older DD's photographer took about 400 photos on her (12 hour) wedding day, and some were when people weren't looking/were just socialising together/ laughing/ drinking/ dancing.
Whilst many of the 50 or so with me on, were quite nice or OK (as they were 'posed' ones,) she managed to get a few that were taken when I wasn't looking - and a few of them were taken from the side. The sideways on ones were HORRIFIC! 😱 I looked all fat and horrid and double-chinny. GRIM! 💀 All 100 guests had the link to all 400 photos, and we could choose what we wanted - to print. 'I thought oh fucking hell I look vile on about 8 of these pics!' 
But then I remembered that no-one gave a shit, and were just looking at/looking for photos of themselves, and the bride and groom and bridesmaids and best man etc.. And most were just interested in the 'posed' ones. A few dozen of our family - the groom's family, and some photos with both families, and some photos of DD and her DH with their 25 combined friends.
DH used to be a fucking demon for snapping me when I wasn't looking/wasn't ready for it, and it drove me MAD. He said 'but you look cute!' I DID NOT! I looked like a fucking sea monster! (Well, to me anyway!)
I look so much better made up/hair nice/decent clothes, and ready for the pic. Funny how the 'posed' and 'not posed/don't know it's being taken' photos make me look so different! I have come to the conclusion that I must look somewhere in the middle! Not hideous, not a glamour model!