When I posted about the possibility of raising the sanity waterline enough to improve the comments at youtube, it actually felt wildly amibitious.
Where would achieving that much fit on the list?
I think, given how many millions of minds it would have to affect and how much sanity increase it would require, it sounds a lot like 6 in practice. (Unless the approach is "Build a company big enough to buy Google, and then limit comments to people who are sane", in which case, 2.)
From Hacker News.
This made me laugh, but from the look of it, I'd say there is little work to do to make it serious. Personally, I'd try to shorten it so it is punchier and more memorable.