I simply can't grasp taking someone else's animal. However, i've heard stories of this kind as well unfortunately...
On the flip side, I came across a fresh kill while archery hunting this year. in oregon Appeared to be a nice bull with 3 game bags left. I ended up running into the guys on the way down the mountain as they were coming back up. They looked haggard, tired and worn out...I asked if they needed help getting the last load and they both looked like they were gonna cry after I offered. Went back to the kill with them, loaded up and we walked out to the gate together.
I ended up shooting nice 4x6 bull with my bow the very next day. I'm a firm believer that the Lord blesses those who bless others.