Well, that's great if people are considerate, but it works both ways. We have been soaked so many times by inconsiderate people with wet ponchos on that brush by us coming indoors, or sit on the bus beside us without blinking an eye! We prefer umbrellas, and are super careful and considerate of other's faces, eyes, etc.
Not much of an issue with us anyway, we never stick around in the rain, so are not walking around when it's pouring - yes, we are in the minority, but we plan enough days there that we 'will not' stay in the parks if it's more than just waiting out showers inside. Love rain, do not love getting my feet/shoes/whatever soaked.