I don't even own a pair of white sandals. I always preferred brown or black. I do have white tennis shoes which I rarely wear, but I would maybe wear them in the middle of winter given the right occasion.
For those that think they're so "OUT" though (white tennis shoes that is), perhaps you should visit the high schools around America and inform all those students because from what I seen, they're really "IN" this year. True, it's not Labor Day yet, but I suspect they'll be every bit as "IN" next week as they are this week.
As for white shoes, I don't think I've ever bought a pair in my life.