It's a good idea. However, the problem that most people have with the sister sites is that the questions are posted together with the questions from Mahalo and you cannot differentiate between them until you have viewed the question. As the payout from these sister sites is significantly less than the main Mahalo site, many prefer to answer only the Mahalo questions.
What you are proposing will in effect allow them to easily view questions only from the sister sites but will not help most. A better solution will be to also add links to Mahalo questions only along with the sister sites or to be able to filter the questions to get questions from Mahalo only.
Yes they should. With the large amount of them its hard to know what is and what isn't.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.