- we're just about to discuss a contentious topic and vote on it. i bet bob and lauren will be opposed to our suggested solution. wouldn't it be nice if they accidentally happened to get unsubscribed for a few days without notice, so they can't rebut our arguments?

- adding a new member to the list requires a vote of approval of the existing members. bob apparently unsubscribed last week and now he wants to resubscribe. can we take a vote on whether to let him back in or not?

- when someone who isn't a member of the list attempts to post to it, we add their domain to the spam blacklist and report them to vipul's razor. hmm, weird that bob.example.com is on our spam blacklist, how could that happen?

- bob, i'm afraid i have to write you up for having violated the new company policy i posted to the policy-announce-important list last week. well, if you didn't read it, that's your problem

Malicious compliance, to make unsubscription more annoying, so spam can continue to flow.