I think bitL is saying that reddit embeds some sort of tracking script in “soon-to-be-banned subreddits” that they don’t embed in normal subteddits, and that you can tell this from notifications within Tor
Don't ask me, it's just an observation. I don't think Reddit employs imbeciles so the usual "oops, a bug there!" is unlikely. But given it's pretty easy to track a visitor across multiple social networks in real time, including their real identity, it's good to be aware of it and even being a bit paranoid about one's privacy while on Reddit.
