Also, years ago have had friends websites attacked and shutdown through their hosting company/datacenter. So a court order, heck just even a request from a law enforcement agency to where you have your website or witness node could be another attack vector. I've seen hosts shut down people's sites just for a simple cease and desist letter from a lawyer. Hosting companies want no part of that trouble so it's easier to comply.
So just think if a gov went after hosting/datacenters hosting witnesses.