[throwanem]

So, this gets to a fundamental or "death of the author" ie philosophical difference in how we define what an API is "for." Do I as its publisher have final say, to the extent of forbidding mechanically permissible uses? Or may I as the audience, whom the publisher exists to serve, exercise the machine to its not intentionally destructive limit, trusting its maker to prevent normal operation causing (even economic) harm?

The answer of course depends on the context and the circumstance, admitting no general answer for every case though the cognitively self-impoverishing will as ever seek to show otherwise. What is undeniable is that if you didn't specify your reservations API to reject impermissible or blackout dates, sooner or later whether via AI or otherwise you will certainly come to regret that. (Date pickers, after all, being famously among the least bug-prone of UI components...)