Don't make me tap the sign 
I don't know them, but I was talking with some of my industry friends about this last week. One of them was saying that they're basically giving the middle finger to most of their clientele, based on the assumption that most vegans are "left" and "left" people are mostly on board with vaccines. But another wasn't sure about that, because a lot of anti-vaxxers are hippy-types who don't trust "Big Pharma" and put their trust in "all natural healing" like naturopathy, herbal remedies, and so on... probably a lot of them are vegans or vegetarians. So I can imagine there being a niche market for an anti-vaxx vegan hang-out, just as I can also imagine that "Bubba Jack's Roadkill Bar And Grill" redneck restaurant might also have a lot of patrons who'd support them defying the vaccine passport program. I could imagine the Renegade Kitchen owner being an all-natural medicine guy who doesn't trust vaccines; this might be a matter of convictions for him. On the other hand it might also be a business move. This has probably earned them at least a little bit of free publicity and people who might not be inclined to visit a vegan restaurant normally might pop in for a beer or whatever just to support him.
I know of another place who had promised to flout the proof of vaccination rules; I wasn't planning on visiting there either. The places I do visit regularly have been diligently checking for proof of vaccination at the door, and I'm happy that they are. I've asked the managers if they've had any trouble, and they've told me that things have gone surprisingly well so far.
-k
On our recent trip to the conservative interior of BC, where vaccination interest is pretty casual, we wondered if we'd have to show our passports - we figured, not so much. But we were wrong; we had to show, and they wouldn't let my 18 year old grandson in as he didn't have one. Talking to the waitress, she said they didn't like it, but if they didn't comply, they would be facing a $5000.00 fine, and non-compliant customers could be facing $1500.00 fines. (I think those figures are correct, but may be misremembering - anyway, they seemed high to me).
I don't like the coercion of such high fines, and in BC, where there is already about 80% compliance, I don't know how necessary they are. On the other hand, our ICU beds are filling up and people are still dying. I'm fine showing a passport, personally, and think everyone who can should be vaccinated - just wish there was a different way of achieving that, other than forcing businesses to be 'police' to some degree.