I support it. I think higher wages for unskilled and semi-skilled workers is generally a good thing.
But then, I make a conscious effort to live in an area with reasonable housing prices.
I support it too. If it takes more money to attract people to work at your business, then you have to pay more. And charge more for your product. Your competition will be paying more, too, so it's not like you're at a disadvantage.
On the other hand, I don't actually live in SF, so if it costs $100 to buy a pizza there I don't really care.