Wondering if you ever found a solution for suppressing hyperlinks in documents?
I have no idea if this works: In the admin console search the space (hopefully it is not a group), select it and click 'Edit'. In 'Filters and Macros' 'Copy global filters' and modify the link filter to exclude 'Body'. This should affect also the forum etc.
If you really want to try this: Please test it and all side effects in 'Staging' before you go live.
that did not work. The content was still turned into a hyperlink.