I see...you just reminded me of the time a friend took a picture of me canvassing (it was of me) - and the man and woman came out seeing her sitting in my car taking the picture and started screaming at the both of us -- and scared us so much, my poor friend gave them her hard drives, we wanted to get out for our safety.
We wrote a letter of apology and they ended up sending it back -- I don't think they said sorry though...but I agree: it's paranoia that makes people dangerous.
I'm glad too you left unharmed.