I've hidden my Earth Science community from the "regular" network profile.

![Community hidden][1]

But whenever I go on Area 51, it says that I'm active in that community.

[![Community visible][2]][2]

Is there a workaround? Why does it not universally hide them in the first place?

  [1]: https://i.sstatic.net/m1fTq.png
  [2]: https://i.sstatic.net/7A0rj.png