This has happened to me at least 3 times in the past few weeks. Basically, a user asks a question. I put some time and thought in an answer and reply to their question. I come back a bit later to see if they have commented on my answer and I don't have any notifications. Fine then, I check my list of recent answers but I can't find it in there. Perplexed, I check my browser history and retrace the question only to find that it's been deleted by the author.
I'm not sure what the purpose of this is, but perhaps someone could clear it up for me? Why do people do that? Is it because they realized what the answer was themselves? In this case, they should probably post an answer and accept it, to help other people who will encounter the same problem? Maybe from the answers they were given, they realized that the question's answer was obvious, and are ashamed of having asked it? Even in this case, I still don't think they should delete the question, but instead accept an answer and thus reward those who gave time answering their question, and maybe help others with the same problem in the future.
Am I the only one seeing this or is this a common problem? I wish I could retrace all the times this has happened to me. Is there something that can be done against this?