It does not matter if a user abandons a question. The
content in the question and the answers matter and not if it is owned by someone or not.
I have come across lot of questions that have been abandoned by users but still have helped others facing the same problem. Sometimes, I leave faq links on new users' questions to make them realize how to make best use of accepting answers that might help others. You can only do so much to point them in the right direction.
Some users really take good note of the inputs. That really encourages me to think that at least there are users who listen to your inputs and also act upon it.