I guess the title's quite self-explanatory.
I have read man-a-times in the news (like the story below) when animals are in their territory, a human enters it, animal kills the human (prolly cos it felt threatened or attacked), then the animal is put down.
Elderly Calgary man gored to death by bison: police - Yahoo! Canada News
The animal doesn't know it did wrong.
Can someone please enlighten me?