I think posting somebody's idea just to have a giggle at how stupid you think they are is not on.
What would you have said to a ship navigator from Genoa who wanted to sail west fron the westernmost piece of land known to European civilisation ? Surely a suicide mission ?
We all have ideas that can seem crazy to others. Those who never fail have never even tried. Venture capitalists and investors see new ideas all the time... the aim should be to nudge the idea generators in what you think is the right direction - not subject them to public pillory for daring to test the waters with their idea.
Ridicule should be reserved for those who don't want to listen, should know better or seem to be fraudulent... not for naive dreamers