You have to be very funny to make fun of the blind
Nothing is off limits when it comes to humor. Nothing. But the more sensitive the topic is, the funnier you have to be. This didn't meet the "funny enough to make up for the fact that I'm mocking the blind" threshold.
You can belong to the group yourself and this gives you a sort of humor 'pass'. So Kennedys get to tell Catholic Jokes. Chris Rock can point out the subtle differences between Black folks and 'those to whom books are kryptonite'.
Be funnier, or pick an easier topic. Like dog fancier operating system or Gay dude operating system or even make fun of short people and have all the icons on the bottom or make fun of Linux users or arabs (folder names like 'sand' 'fine sand' 'regular sand' 'recycled sand') or even russians like maybe a preloader with the wait time for a fresh orange measured in weeks or the elderly, vegetarians, elderly vegetarians. . .
Nevertheless, this was a brazen and thoughtless act, and I applaud it on that level. You took the time to load it onto the NG server and it did not get blammed, that's good too. The voices are uncommonly good, even the female voice (hence the good sound score).
One man's opinion (not my fault if it's spot on) ;)