Some questions about Etherpad with MyPads plugin

I wanted to know:

  1. What is the benefit of the MyPad admin interface?(It don’t have anything special,as users are needed to be searched manually too)
  2. Is the admin password asked while installation both for the main admin and MyPad plugin?
  3. I want to have a plugin which shows me all the pads with there last access date and the user who created it so that I can delete the pads manually after the pad has not been used for long time.
  4. There is no logout option in the main admin interface. Is that done deliberately?
  5. How can I no. of users registered and give them limited the space for there pads?

Any user case with the help of plugins for the productivity are most welcomed to share them(there are lot of plugins).