this is complete nonsense.
what are they going to do if i just ignore them and walk right in? are they going to call the police? are they going to charge me with not wearing a mask?
you can be sure they'll end up with a charter case, if they do.
they have no enforcement rights, here. at all. nor does their status as private businesses give them the right to discriminate against customers based on their clothing - that's what human rights laws are for.
https://www.cbc.ca/news/mask-rights-covid-questions-answered-1.5590534