If we are talking bout account farmers then they could simply make a long post or ask a question instead in any of the eligible sections. NO ?
Sure they could. However, the number of posts that they could make would be very limited in comparison to other sections. Unless you think that it would not be obvious if someone asked an unusually high amount of questions via multiple threads/posts. Besides, one could always suggest them to use PM for further questions.
Why would we exclude Politics & society ? There's some interesting discussions that take place there. Most of them are well argumented and the posts there are qualitative.
I concur. Considering the suggested sections so far, Politics & Society seems the least likely candidate (quality wise).