The solution I suggested does work, but it’s really hard for some people and not possible for everyone to do.
My title implied that it’s easy or trivial and I shouldn’t have written it that way.
I think indicating the speaker is a good thing to do if you can, but I recognize that not everyone can.
And people who can’t, or find it prohibitively difficult, still have the right to use tumblr to communicate.
I’m changing the title to from “A simple thing you can do to make Tumblr more accessible” to “Making Tumblr conversations more accessible”