Reflection on Question #3 of pgs. 148-149 [of our Ethics textbook]

A technical communicator/writer has, in my mind, a limit on unknown quantity of as how much responsibility he/she has for a technical document to be read and fully understood by the audience involved.
I don't believe the writer's ethical responsibility lays with only the original message. I personally would follow-up within a reasonable time-frame, to make certain the document I developed, sent and/or delivered. Once I received a response from my document's audience,I'd send another communique asking the original document's audience if that message was read and fully understood. I ensure, as best as I can, the importance of that message, and of course, make copies of what I sent and received. This is called, I believe, 'c. y. b.'[ "cover your butt"]
After all that, then the ethical "burden" lies in the reader's lap. I did all I could possibly do to get my audience to read and understand the document I was presenting them.