How do I turn off the activity points?
The activity points are required amongst other things for the award of ranks. If only the display to be turned off in posts, then you can do this under System -> Options -> Messages -> Sidebar. To disable the activity points completely, put it all to 0 under Adminstration -> Users -> Activity Points. If activity points have already been assigned, then you must update all affected counters under System -> Maintenance -> Rebuild data.