Increased population density for cities and less sprawl is something I generally agree with but not so much for SF. It's a very unique city with few issues and apparently the people who live there can afford the rents. I think creating high rise residential buildings and doubling the population would ruin that city.

Now, Buffalo (pop. little over 400,000) on the other hand, where I live could really benefit from increased population density. We have been destroyed by suburban sprawl over the years which has resulted in unnecessary higher taxes for everyone and other issues.