Look into the public-facing (non-membership) mailing lists used by some of the hackerspaces. They all have their own passions and politics, so the ones I like w

Look into the public-facing (non-membership) mailing lists used by some of the hackerspaces. They all have their own passions and politics, so the ones I like won't likely be the ones you like. CCCKC has an information-security specific list that's just starting to get good. The main list may be too eclectic for most.