If you have your default setting on your own journal to "friends-lock all," that will carry over as a default to your posts on communities. I don't think it was always thus, but it is now, so my guess is that the poster didn't actively do it, he or she just neglected to make sure it wasn't done.
![[community profile]](https://www.dreamwidth.org/img/silk/identity/community.png){kind=small}
![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
no subject
Date: 2011-02-25 11:14 pm (UTC)