Have you ever given an answer that it is and can be proven as correct but has never been accepted or upvoted? It is so frustrating!
I am not a child and I am not whimpering, I know the rules, most of them, around here: no one is obligated to answer, to accept an answer, to upvote or even to ask a question, we do what we do voluntarily, but still, zero votes is frustrating. How can we fix that?
I thought that a mechanism able to predict the questioner's (OP) intention (approx) to accept or to upvote an answer based on its past activities would be useful, rather complex but useful (making an evaluation of the user's profile manually is time consuming). Bounties are close to that but not so efficient, are more for special occasions.
On the other hand, educated users in DA terms could be an other and maybe the most appropriate solution.
Perhaps I am not aware of many things, moreover I am not such an experienced user, but I wanted to stress this issue and share my thoughts.