by Descartes

I was looking at the URL for my Hubski feed, which is:

http://hubski.com/feed?id=Descartes

And I noticed that if I swap my username with another Hubski user, the feed changes and includes tags/people I'm not following, so I'm assuming I can see what other user's feed look like if I just swap their IDs into the feed URL.

I don't really have anything against it, just thought it was interesting. Has this been brought up before? Is this a conscious decision in Hubski's design?