> As far as I know, it is impossible to use the BTS without getting spammed, because the only way to interact with it is via email, and every interaction with the BTS is published without redaction on the web. So, if you ever hope to receive updates, or want to monitor a bug, you are also going to get spam.

Do the emails from the BTS come from a consistent source? If so, it's not a good solution, but you could sign up with a unique alias that blackholes anything that isn't from the BTS.