Whya have people stopped posting questions to Yahoo answers in Beer, wine and Spirits?

They haven't. There's something wrong with Yahoo Answers, and it seems to be across the board. From what I can see, in some sections, questions posted over the past two hours are there, but then all the other questions are from a week ago. In other sections, all the questions are from a week ago. And people are also saying that questions they've posted over the past week either aren't answered, or disappear, or they are notified that someone did answer, but when they go to look at the answer, it's not there. So you're not alone, and I think it's a tech issue. However, I no longer see a link (which did exist before) to tell Yahoo they have a problem, so I don't know if they know about it.

Maybe because they get sick of you thinking you are the moderator of the section when Yahoo Answers auto categorizes questions into that section.