I hate the "unenforceability" defence slopists use against these policies. At work we were pushed away from using the "absolutely no AI" category for assessments, for exactly this reason

Yes, all crimes are essentially unenforceable if the criminal is not caught! The answer is obviously not to legalise all crimes. (And besides, most of the time it is blatantly obvious when someone has used it)

The point of a policy is really to outline a set of expectation and a group ethos. If someone chooses to deliberately break the policy, they must be conscious of the fact that they do not align with the group and should probably fuck off