I can't say I agree with this sentiment. This sort of thing happens in other food service outlets and it's never bothered me. The one that comes to mind is grocery stores having separate slicers for meat and dairy to accommodate those who keep kosher. I'm not Jewish, and neither am I a vegetarian, but I wouldn't call those who do keep such lifestyle choices unreasonable.
Also, the word demand here commands more than one meaning. If there is demand for such a separation, and money to be made from accommodating that demand, those practices will find their way into the market.
Look it, no one is demanding anything. They're mis-representing their product. That's all that I'm saying. The end.
Everything else you're saying, your railing against the so-called "vegan moral framework," etc..., is, to me, just you grinding an axe.