I like this, and it’s probably what I would do: when some guy strolls into a restaurant flaunting his great big weapon, get up and leave. It grants them a lot of power to ruin your evening, but I think the risk of getting shot would ruin it even more.
It puts more of the onus on business owners to keep the heavily armed pests out, but they already do police their place of business — keeping dangerous buffoons away is just one more reasonable requirement.
The philosopher in this video spends way too much time arguing against a silly objection: the gun fondlers are claiming that this is oppressive, and that we’d object if people walked out if a black family or gay person showed up. It’s an argument that doesn’t hold up: the presence of black or gay people doesn’t put me at physical risk, and further, I’m not objecting to the presence of the gun fondler, but to the presence of their gun — leave it at home, and there’s no problem sharing a space with them.
He doesn’t consider the serious flaw in the strategy: it only works if a significant number of people follow it. If a majority favor strutting about with guns, then those who leave become the minority that the businesses will not cater to — a minority that costs them money because they leave without paying for services.
This might be a serious problem in Texas.