Yuku profiles have a feature which displays your recent post history to all and sundry.
It's of questionable value as you can view your recent history via the navigate button without broadcasting it,
(see attached pic)



Removing your post history from your profile is easy and also prevents headcases with a manic grudge/crush stalking you around your various groups.

• Click "account" (on the top bar, next to your username)
  
• Click "Edit Profile Layout"
• Click on "My Recent Posts" box.
• Click on the X to disable your post history being shown at all,
  (see attached pic).

Click "Done" and you're sorted. Privacy restored

Fishy.