There needs to be a point at which one can reasonably determine that someone has done everything they possibly can, short of not running the node, to keep illeg

There needs to be a point at which one can reasonably determine that someone has done everything they possibly can, short of not running the node, to keep illegal content off of their machines. I don't think the only solution need be to abstain from using the system. This is an age-old problem, almost as old as the Internet itself.