@Varnas
You did nothing wrong, and she was being unreasonable.
A friend of mine had a nasty experience similar to yours several years ago though. She was taking pics of some chickens in this garden as they looked cute, and a woman came screaming down the pathway, demanding to know who she was and why she was taking pics of HER HOUSE. She said 'It's OK, I am just taking a pic of the chickens.....
'
The woman said 'who are you, where are you from, what's your name???!'
My friend just said 'blimey I will just delete the photo if it upsets you THAT much, taking a pic of your chickens.'
The woman continued and said 'this is a very precarious house. It's a secret, safe house for battered women, and abused children! You have no right taking pics!'
'Not very bloody 'secret' now is it?!' said my friend. 
Stupid bloody woman. Kicking off and blabbing it was a 'safe house!' People aren't supposed to know! 
My friend never said which house it was/where it was by the way... Just that she passed this house and saw some chickens. But she could have blabbed it anywhere and everywhere that it was a safe house, putting the women and children there at risk.