@SteveF I’m not sure what you mean by public, do you mean can it be hacked? If so, the answer is “no” in the sense that I am just running 100% vanilla Discourse. And I really don’t want to have to fork it — it works really well out of the box and most nicely it pretty much just updates itself.
As others have indicated, Meta is the right place to report this. I am very sure that they would be happy to work on making sure Discourse is accessible. I can’t say I know them well, but what interactions I’ve had with them show they’re really nice people.