I don't get it here either. On our lease the cyanide gunners hang em from mesquite trees. I suspect to show the owner they are actually accomplishing something. But if I was a trapper and you didn't take my word, we wouldn't be working together... no need to hang anything.
Although this weekend they had one hung with a lone star light bottle in his mouth.. it did get a chuckle from me, as stupid as I think hanging is.