I would love to see a setting to disable them for, in order of priority:

1. no counter on the notifications at the top bar
   

2. not seeing the "people also viewed" feature (currently only possible on one's own profile) and "people you may know" when on someone's else's profile
   

3. no counter on "my pages notifications", "impressions of your post" and "who viewed your profile".
   

4. not seeing "People who follow [name] also follow"