Try this
- State the current no before the camera is raised where possible.
- If a photo has already been taken, ask what you want done with that specific image. Keep deletion, private storage and publication as distinct actions to discuss.
A worked example
“I don’t want to be in photos today.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Suggest photographing the place or activity only if that is an alternative you want.