Profile "Activity" box is NOT for PMs!
Just another reminder, the "Activity" box on profile pages are NOT for personal messages. These posts are PUBLIC.
The "Activity" box is a useless mis-feature of this forum software that can not be disabled. Although I hid the Activity stream link on the main page for normal users, it is still possible for others to see it. Furthermore, due to people posting crap in these, these Activity posts will usually be deleted.