The public feeds (.rss) should have the <source> attribute (well, for better attributing, e.g. when using these links to post on Twitter, Facebook, whatever.

Like this:

<source tor:stream-id="feed/http://lifehacker.com/index.xml">
<id>
tag:theoldreader.com,2013:reader/feed/http://lifehacker.com/index.xml
</id>
<title type="html">Lifehacker</title>
<link rel="alternate" href="http://lifehacker.com" type="text/html"/>
</source>

Thanks for your consideration :)