At the moment, I'm just adding the license to my text, but if somebody has something I could copypaste and put into a spoiler to poison AI training, that'd be great.
One thing I was kinda wondering about - as long as there's nothing in the T&Cs of your instance, don't you implicitly hold the copyright to your comment? Isn't the CC license actually more permissive? Or is it more about "that model was trained on content available under this license, to comply with it, they have to follow it's terms"?