They might pass though if they can't get the site to work well on their phone.
In fact, this happened last week--I was trying to purchase a plane ticket and the animations were so excessive and poorly done that it obscurbed a form field that made it impossible to book the ticket. I bounced and booked a ticket from a competing airline.
I refuse to go to restaurants that have QR-code menus that download a PDF with unusably small entries.
Unless you HAVE to use something, you can still vote with your wallet. Herman Miller is not the only furniture company in existence.
It gets worse. I've been to a restaurant in Silicon Valley where not only were the menus reached through a QR code, the linked page was not the menu. It was the onboarding funnel to get customers to sign up for a food-delivery service. You had to sign up to get menu access. Then you could order online. Dine-in was just ordering food delivered with a really short delivery trip.
Here in Seattle we have a few restaurants that use a similar model, you scan a QR code and order food online, only it's "delivered" to your table. But they don't need any account information from you, so it's pretty convenient.
Oh yes, about half of the time when a restaurant requires me to scan their QR Code to read their online menu, it's a 20 MB PDF - not a responsive web page. And the PDF usually has multiple columns of text, which means I need to zoom and horizontally scroll (generally a big no-no in web design). I'm a technologist at heart and I find this implementation so needlessly bad, and an extremely poor use of technology. I would prefer a no-bullshit paper menu instead.
I either go on the restaurant's website directly to find the menu or ask for a physical menu. I've never been tripped up by that. I understand I'm still rewarding the owner for their bad choice, but I'm not going to force my friends and family to get up and leave a restaurant we all wanted to try out because of it.