We can always remind ourselves and others about the precautions and steps to make sure that holdings are secure to prevent loss, though I'm sure that there will always be mistakes and irresponsibility (both are human nature after all) and therefore Bitcoin will always receive involuntary donations.
I agree with that, I do not think that they donated to make sure that the supply drops and the value would go up. I think they just involuntarily did that by making a mistake. I have done that before, there is some money out there somewhere in the world that I used to own. I am fine with it and at peace because it was about 10 dollars back then, and probably somewhere close to 3k today, and will probably be more later on.
However, I had the chance to get more of it when I can and decided not to, so it is going to be a different situation. In the end we are talking about a situation where it is going to be difficult and we need to learn to live with it and can't really make a big difference in the end when the time comes.