Above all, startups in SV is something that doesn't have downside to people coming out of college. Even with miserable failures, you would be most likely get aqui-hired with 3-5X better pay package than someone who had worked for a decade in that same company.
However I totally discourage people dropping out of school to do startup. I get truly disgusted when people suggest that option. As Guy Kawasaki used to say, stay in school as long as you possibly can. Rest of your life is very likely going to be in one job or another unless you hit a lottery.