in response to...Hi WHO~KNEW,
The group space is very much like your personal space - you can create pages in it... and, yes, they'll be linked together.
You can "add" people to the group space without asking for their permission. However, they'll be getting an alert in their inbox telling them about the fact that you added them to your group. And, they'll always have the option to leave the space.
People will also become participants by simply posting in your space. Once they post... they participate - don't they. But you can remove them from the space if you don't like them.
By default, if the group is public, visitors and other aidmates will be able to post comments and even make new pages in your group space. But you can change the participation settings from the Menu (show more...) -> Local Settings.
And yes, you can close the group space by removing the participants and yourself from the space.
The best thing you could do is just try and explore. You can't really do a big mess... and if you do, we'll help you... :)
Learn by exploring - this is the Aidpage way of doing things... :)