Once you give players an ability, you really can't control how they use it. People can do whatever they like with a photo mode, as the devs behind Assassin's Creed Black Flag Resynced have discovered due to the amount of feet pics they've seen.
"There's just nothing like having one million or two million players playing a game at once that you can't replicate. The feet pics were very surprising," Richard Knight, game director on Assassin's Creed Black Flag Resynced, tells JorRaptor. "That's kind of what photo mode is there for – to take really interesting, sometimes unusual, photos."