She thought:
1. That I needed her permission to photograph her horse (I don't)
2. That she could demand to see the photos I had taken (she can't - I was shooting film so it would not have been possible anyway)
3. That she could demand my name and address (she can't - although my vehicle was parked nearby and she did write down the registration number)
I like the photo quite a bit, but I have to say that between the gate, the fenceposts, and the wonky skyline, it makes me a bit dizzy! Not your fault, they all have a different idea of what 'up' happens to be.
As to the lady in question, yes, that happens quite a bit.
I read a news item in the local paper last summer about a lady who creates textile artworks and sells them at 'art fairs' that are open to the public; I'm sure you know the kind. She is outdoors on blocked-off city streets - so are the attendees. There is no admission collected, it is a public venue in every sense of the word. But she fears others will photograph her work, copy it, and ruin her business. So she was describing to the reporter how she confronted everyone she saw who had a camera, and in one case, she took it away and triumphantly smashed it - all the while threatening to 'call the police' on the man she took it from.
The reporter did not do the slightest bit of research into what the woman said regarding the legality of her 'confiscating' and 'destroying' cameras from passers-by, she just reported it like the artist was the victim and how terrible, awful, and bad those photographers were to have presumed they could just take a photo of anything they chose! Of course, the news article was illustrated with a photo of the woman standing, arms crossed, in front of her booth - and you could see the textiles hanging there. I guess reporter's cameras don't steal copyrights.
I don't go to art fairs anymore. I don't really like artists. Most of them are jerks.