A sensibly written law could close loopholes like the one you described.

I'm not sure an ATS would be required either. Simply having a law that requires a response when inquired about the status of an application after a certain amount of time would suffice.

I was ghosted by a Fortune 500 company after making it to the final round of an interview recently. It took me weeks of sending emails to get them to tell me they didn't want to hire me.