Did they try other alternatives, like reflective tape? Wrap it around like handlebar tape. Make it degradable or else the woods will fill up with junk.

Let's brainstorm some more, design a special hunter-seeker robot powered by AI that captures deer in the wild and performs this menial task.

Thank you, I'll show myself out.

I think what fancy cars do with infrared cameras is the actual solution. I don't know what's so prohibitively expensive about infrared cameras, I think it should be standard in "mid+tier" cars in the nordics and similars. However fencing has become very supermegamuch better which works well too, i guess because of more automated installation

Not to mention they have to round up all the deer and paint each and every one of them first. Which is probably fine for farmed deer but not wild ones.

... which is in fact what the article YDNFR is about.