also arguably it's too ineffective considering how hard it is to open a restaurant. (because instead of harassing random taco trucks we should focus on other preventative measures, better visibility of food safety, better reporting and tracking)

sure maybe it's time for a "Let's Email" (after letsencrypt) service that handles reputation for email senders.

we already have certificate transparency logs, OCSP, CAA records, and all the fancy stuff, what's needed is something similar.