Nice hunt.... It happens a lot to us. Almost exclusively while hunting public but I could see it happening with neighboring private areas also. I used to first chalk it up to ignorance and just thought they need to be better educated, but I now assume it's more nefarious. There are people who wake up in the morning with that pile pic on their mind, and if it doesn't look like they're going to get it, the desperation and unfortunately jealousy comes out. It really can bring out the best and the worst in people. You saw what happens when it brings out the worst.
"Speak when you are angry, and you will make the best speech you will ever regret." - Ambrose Bierce