Why do people ask a question, then don't keep it up long enough for me to finish typing my reponse?

I see that this has been asked before, but I want other askers to realize that it is SOOO frustrating! When people ask personal questions, I usually put A LOT of thought and time into my Answer; trying to make sure I make it relevant and thorough, yet readable. Then I review for spelling/grammar errors, then hit Preview, check it again, go back and edit if needed and finally, I hit Submit and see...

"the Asker has removed this question"

AAAARRRRGGGGGHHHHH!!!!!!!!!!

Is there a way that Yahoo! Answers can make potential Askers more aware (and hopefully appreciative) of what we're doing here? I also have several Answers I've provided that have correct information, but because I was the only one who responded, the Question is still open weeks or even months later! If they got what they wanted from the one reply, I think it should be acknowledged!