If I get asked to take a photo with someone, I usually then ask how they want to pose, and offer up some ideas. This way, I can say 'I'm not comfortable with that' if they come up with something crazy (not that it's happened to me!), or I can warn them if a particular part of my costume is easily damaged (which I have done before).
I've found it makes for more fun shots too-- I'll pose like I'm fighting the other person when I'm in my Kyoshi Warrior garb, whereas I might curtsy to the other person when I'm in my Twilight Sparkle ballgown. It's an added chance to be in-character, and people tend to love it!
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- Emperor Lelouch (Code Geass): 4% (Planning) Otakon 2015
- Hilda, Player Character (Pokemon Black/White): 32% (Sewing) Otakon 2015
- Magic Armor Link 2.0 (LoZ: Twilight Princess): 5% (Armor Revamp) Summer 2015
- Pyrrha Nikos (RWBY): 1% (Planning) Otakon 2015