How do you prevent people from writing code or buying GPUs not just in the US but worldwide? You are missing my point entirely. The barrier to entry is so low (

How do you prevent people from writing code or buying GPUs not just in the US but worldwide? You are missing my point entirely. The barrier to entry is so low (and getting lower) and policing difficulty so high it seems inevitable. We also passed laws against and police computer crimes and those are on the rise for the same reason- low barrier to entry and difficulty policing.