[westopher]

1/10 people(ish) aren't vaccinated. Those odds mean that 1/10 restaurant owners/managers/those in charge of checking aren't vaccinated, so word of that will travel pretty fast if people aren't being checked because those that don't think they are doing enough will tell everyone, and those that want to give their antivax business to the "vaccine nazis" will also tell everyone.
Like I said, we've only had a few people in the last few weeks not clearly ready to show proof. At 300-400 people a day those odds seem pretty good. They need to use the right avenue to police it, and just like they do with underage drinkers, they should send people in with the expectation that they show proof of vaccination, and if they aren't asked, establishments should be fined. If that had been happening I'm sure I'd have heard about it by now with the amount of people I (and people I work/have worked with) know in the industry. Word travels fast.