And dont insult yourself by saying you would be ok with seeing someone who is completely blind (dog, stick, sunglasses, whatever) carrying a fully loaded cocked 1911 in the small of their back.
If we are talking about 'totally blind': What do you suppose a blind person does to protect themselves then? Do you propose a knife? Martial arts? Just standing around?
I certainly wouldn't carry a firearm unconcealed if blind, and it would be something that still fires if pressed against someone. Honestly I wouldn't care if a cane/dog blind person had a firearm in the small of their back. I'd question the utility, but wouldn't feel threatened (Although being blind might make it easier for someone to snatch an unconcealed firearm, and SOB carry is a good way to get paralyzed as well).