I tried to make this point on Reddit, and was downvoted to a smoking hole in the ground by people who were complaining that they can't get GPUs to play games, and that it's not eco-friendly. Of course, playing games on high powered GPUs is super eco-friendly, as are many other ways of making money...

Half of them think people are mining Bitcoin on GPUs, and almost none of them know about Proof of Stake coins. Not that I want to excuse the egregious power consumption of PoW coins, but I do wish the holier-than-thou crowd would at least do a little more research.