You jest but this is exactly how Anna’s Archive was set up. Anyone can copy the infrastructure code’s git repository and set up a mirror of the site and trackers under a new domain relatively quickly.
Maybe a similar setup can be done for banned AI weights?
Yes. It feels like we're heading into a dystopian Neal Stephenson novel - there will be a grey market trade in custom models with different specialisations, which people slot into their hacked-together hardware to help with different tasks.