If you really care, sign a ZDR contract with OpenAI or use Bedrock or something.
As an example, in the industry I work in, software license enforcement is quite easy to break if you want to. But you never would, because if your employer found out they would fire you on the spot. They don't want to violate their license agreements even if it meant free use because of the legal liability and the future loss of access to that product. Enterprises make a point of tracking their own license usage specifically to make sure they don't accidentally end up in violation. The systems are mostly about tracking and auditing for compliance, not about technical blockers to make it impossible.