I will get onto this. Local Politicos is same as always, click to join/leave on the Groups page.
General Politicos is now for verified members only, and you can click to request access and either @londondrz or @armadillo will grant it.
If anyone would like to leave General Politicos, drop me a PM and I’ll be on it straight away. Click “Leave Group” on the Groups page to leave General Politicos.
This should get simpler and less manual in future - I have made a proposal to the developers.