There may be other unforeseen breakage primarily in the handbook portion of the wiki.
The Table Of Contents section of each "PC-BSD® Users Handbook" page may be the best workaround.
Removing a package or a port
The pkg_delete command can be used to uninstall either a package or a port from within Ports Jail. If you include the -x switch, you don't have to give the full name and version of the software. Be sure to give enough of a name so that you don't inadvertently uninstall other software matching the name:
pkg_delete -x kopete
If you just get the command prompt back, the delete was successful. You can verify this by checking that the package no longer exists in the package database:
pkg_info | grep kopete
You will just get your prompt back if no packages match that name.
If the software has other applications that depend upon it, pkg_delete will refuse to uninstall it. If you wish to override this setting, you can use the -xf switch to force the delete. However, use the force switch with caution as removing dependent software can adversely affect the applications that required that dependency.