Thanks to this feature-request and the ability to use the OR operator, we can have multiple tags and can include wildcards in tags to make broad filters in RSS feeds. In the main Sci-fi & Fantasy.SE chat room we use this to get a kinda ridiculous filtered feed of questions on Movies & TV.SE that are sci-fi/fantasy.
I was trying to expand it just now to add a few more works. Starting with
star-trek* is the new stuff in the feed URL:
Trying to save this monstrosity of a feed URL generates a cute cat developer error page. What are the limitations of the chat feeds that I'm bumping into here?