In the past I've given lots of information about requests to moderate or otherwise remove content from forums I run.
Then I was hit with a cease and desist, and again provided transparency of it. The very predictable Streisand effect kicked in, and then I was hit with a harassment case too (for disclosing the details even though I knew it would likely trigger Streisand).
It was all resolved quite peacefully, but one fire-fights these things reasonably over the years and get to learn that the other party is usually not being reasonable. You can either result in escalation, or you can calm things down.
It's a lot easier to pick the option that calms things down if it's available to you. And in case above, that was apocalyptic, to close the list without disclosing detail behind it.
The last straw really breaks the camels' back. Once broken, it's not getting up to fight on. Life is too short.
"I don't want to do this any more" is enough of an explanation to be honest.
Receiving legal threats (either real of vague promises of one), being accused of censorship and denying someone's right to freedom of speech (and having to explain that's not how free speech works), cleaning up spam and trying to sort out fights between users really wears you down after a while.
A lot of work goes on behind the scenes of running a 'community' and it can be stressful, draining and generally not fun.
You are free to try to step in to the gap created by the closure of this list and run a replacement service. I'm sure someone will.
