At the moment we are going to keep it that way as we are conducting a test.
They were on the top before and when they were there they were a lot more active. (In fact when we moved them posts went down by over 90%)
There are a few options available to you though to change things.
1) On the forum listings page next to the forum description you will notice a
click on it and it closes the forums in that group under it. To reopen it click the symbol again.
2) Go into your account settings, select options and put the forums you dont want to see on your exclude list. And you wont see them anymore.
Again no decission has been made if they will stay there, but we like making the options available to you on what you see and what you dont.