I would just ignore him. And maybe everytime he leaves thumb-down I would leave a thumb-up. Every time he leaves a negative comment I would leave a thumb-down on that :)
I think we can see from history that key ingredients for a push forward were language, axe (as a tool) and wheel.
That's why I think evolution in these areas should be the the change that will transform our world in big way. Transportation as in (Boring/SpaceX/Tesla), tool as in (Boston Dynamic) and communication as in (VR/AR).
But like I said this is more of an evolution than revolution. There might be something new that I cannot comprehend and that will radically change the world. (AI?)
Language, Axe, Wheel, Coffee, Beer, Printing Press, iPhone. Inventions or discoveries that change the world have the common thread of usefulness and suitability. Thinking historically is pretty, it's hard to weed out bad ideas this way. AI is an idea like a "wood cutting implement" is an idea, but it's still no axe.
How about this: Internet as a service. Instead of looking for answers You will "broadcast" Your needs. Like "I need a study about cancer". And You will receive a list of sources that answered Your question. maybe with some sort of decentralised rating and maybe Country and author. How about that?
That's a workable issue. If a random and unique guid is asking for results, it would be hard to correlate users.
Of course there would defiantely be an issue with how you generate the guid (for example if it was generated by the users MAC + some predictable random number generator that might be reversible). So you would keep that in mind. But these seem like workable issues.
iPhone ecosystem needs XDA community. And I say this with full responsibility. Cydia is great, but instead of a store only, the fine hw should be brainstormed by a bunch of lunetics and hackers. So we could see what is the hw capable of.