They're cables, someone can pick them up and move them somewhere else. Some more logic for ya
Anyone who has posted "free" things online knows it comes a cost, thats the logic part I was referring too. When you work through the scenarios the "logical" conclusion is to give them to the recycler that you already have out at the datacenter for the systems you are decommissioning.
(Put them in a box that says "free" in the lobby of the NY office then throw what hasn't been taken a month later)