I am working on the 88 muzzle blast now.
I just roll down my window and yell out a friendly warning, something like
“Hey, idiot, stop standing in the middle of the road waiting for a car to run you over!!!”
Although I’m thinking if I see a blind guy with a cane, just to be safe, and to help them out, I’ll wait until I’m close enough that they are sure to hear me, and then I’ll just blast my horn a few times.
Can’t be too safe these days.