It is odd to me that one can accept their own answer to their own question. I am not questioning the practice that one ought to be able to answer their own question, but it seems that as soon as someone answers their own question the system should default to a vote-based acceptance (after, say, 10 days).
A significant example is this question, which received three answers. The least-voted answer was the questioner's answer, and was accepted by the questioner.
What's at stake is obviously bias in accepting one's own answer. Indeed, it is very common to believe that one's own answer is the best answer. Apparently when someone accepts their own answer, any meaningful information that "acceptance" was supposed to signify has been nullified.