For the most part, I take pics of everything I catch whether its big or small. I usually fish by myself so whenever I take a pic, I'm holding the fish in one hand and working the camera with the other. Sometimes it can be difficult because I can only stretch my fish arm out so far. I have pics of 12 inch fish that take up the entire frame. With pics like that it can be difficult to determine size so I usually try and get the pic with the lure still in the fishes mouth to give it some perspective. Everyone knows how big a KVD 1.5 is and if there's one hanging out of the fishes mouth, it makes it easy to figure the size of the fish.
It doesn't particularly bother me when someone holds the fish out to the camera. They're usually only trying to take a good picture. Just don't lie about the size/weight.