I also hate to see wood wasted....my situation is like this, I always try to scope out logged woods or downed trees.....I always ask/get permission if I can.....I always try to have 2-3 places to cut at any given time.....if I happen to see a "freebie" like a pile of wood on side of road on my way home from work, it's mine, no question about it, I always have gloves in my truck..... I have a place that had 90-100 walnut tress logged and I can have all I want, this spot is a river bottom so I get other goodies like hedge, locust, sometimes......I also have a place that was logged and it is 90% oak, red and white, with 10% ash and hickory...
With that said, it's just common sense to me to go cut at the oak spot until it's gone....why would I go get walnut when the oak is the same distance from my house.....now when I get paying job, like a tree removal or cleanup, I will pull off and do that for sure, (tree work is not my day job).....but any spare time I have is going to be used at the oak spot....
Now if a friend, family, or old customer had a elm, maple, etc fall at their house like my dad did here recently, well yes i would absolutely help them, and take the wood.....but for me personally, I will be cutting at the oak spot until it's gone, or rotten, it will be silly and a waste of my time to do otherwise....