I had a similar situation 24 years ago on my land. A pregnant doe broke her neck by running into a strand of barb wire that was almost invisible between two oak trees. The fence was a left over of a pasture fence. I came upon the doe while it was still warm. That made up my mind. Over the next two years with the help of my hunters, I removed every piece of 5 strand barb wire fence on all my property lines and interior areas. Since none of this line fence was maintained or being currently used for any pasturing of animals, I considered it abandoned property. It took over 100 man hours, but I was able to get every last piece of rusty barb wire fence removed from my property. It was all buried in a deep hole and covered with rocks. One of the best projects I did on my farm. All fence posts were left standing exactly in place.
Only one neighbor complained to me. I told him his fence had fallen onto my side of the surveyed property line and that he had not maintained this fence. I asked him if he would like a bill for the removal of his fence on my land. Never heard back from that joker.