Not GP but I wouldn't? If I've ever been anywhere that was possible it certainly wasn't required; if it were I'd leave.

if there's a scan to order you would leave?

I wouldn't use it, so if it were the only way to order I'd leave, so that I could order somewhere else.

It's not just about being a stick in the mud over the ordering process - it would signal to me that I had the wrong idea of the kind of place it was: I'm sure you can order like that at McDonalds, but I don't want to eat at McDonalds.

“… if it were [required] I'd leave.“

If you read a sentence you just pretend to be obtuse?