If you care about SF housing, please just show up to Planning Commission and Board of Supervisors meetings. Talking about policy on hacker news is useless. Better yet, start or join a grassroots group of at least 10-15 people and thoughtfully present all your ideas without coming off as insensitive towards the homeless or low-income individuals. There's TONS of room for public input in SF, it's what makes our planning process unique. In many cases, this leads to a deficit in housing because planning is so sensitive to the request of those who actually show up to meetings and make their case.