Author here: In developing this I discovered that Twitter really doesn't care about lists. The limits on API usage and aggressive following are well documented, but anything about lists is minor.
Also, if anyone from Twitter is reading: it would be nice if Twitter implemented a way to subscribe to someone's timeline instead of having to resort to this method.
Also, if anyone from Twitter is reading: it would be nice if Twitter implemented a way to subscribe to someone's timeline instead of having to resort to this method.