What Dave does with his money is none of your concern. But since he put it out in the public, you are certainly entitled to your opinion.
You see, that's the point of not telling anyone. Everyone has an opinion and once they know a little something about anything they want to share it. Most of those opinions are how to separate Dave from his money. Nobody needs that in their lives. Not Dave. Not anyone. He was right to keep quite and it looks like he had good reason to keep it quite in the first place. How you feel about finding a middle ground is the problem Dave was looking to avoid. See my first sentence.
You see, that's the point of not telling anyone. Everyone has an opinion and once they know a little something about anything they want to share it. Most of those opinions are how to separate Dave from his money. Nobody needs that in their lives. Not Dave. Not anyone. He was right to keep quite and it looks like he had good reason to keep it quite in the first place. How you feel about finding a middle ground is the problem Dave was looking to avoid. See my first sentence.