I try to be polite when refusing sighted assistance. I am almost always
safer on my own with my guide dog guiding. Tired of being run into fire
hydrants by people who then yell at me while I flinch because my knee has
run into the fire plug and I am having difficulty walking the next few
steps. They tend to yell after making a misstake like that or laugh. I
have been told both are because they are embarrassed. But in the meantime
I am physically hurt, sometimes quite badly.
So I try to be nice and refuse assistance when reasonably capable of doing the walking on my own with my guide dog. Far fewer injuries that way. I too have been walked into steel beams by people trying to help me out. It just plain hurts.