Delete community areas carefully: although you can restore content after deletion, it's not convenient.
For example, each blog entry is its own document available in the Document System. You see the blog, all of its entries, and all of the entries' comments as individual items in the Recycle Bin in Document System. By selecting the item and clicking Versions, you can then select the version that you want to restore and click Revert.
Note: Reverting one object does not revert its dependents: you must restore each object individually, by reverting to a previous version.
To delete a forum, blog, or wiki (SysAdmin)
1. Log on as a user who is a member of the SysAdmin security role.
2. Click the delete link for the item you want to delete.
3. Click OK in the resulting dialog box.