The only way to stop "cut and paste" on your forum is to never post anything on it. Once you put stuff on the internet, there is no control over how people use it. Basically, if you don't want anyone to use your content, don't put it on the internet.
You cannot have sub-forums in this format. You can create an index and then your forums will ALL be sub-forums. You can also add links to your "main" forum to your other forums, but you cannot show them in a typical sub-forum style (like a PHP forum does).
That option might be available in V3, you can check that out here:
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