Depends on the situation. I don't wear masks, so that usually sets them off, and when they ask for proof of vaccination I say, "I am not participating in the city's new program." or a variation. I don't say I'm not vax'd, only that I'm not participating. Mixed reactions for sure, but mostly people don't want to ask. They don't want to participate either. Sometimes (rare) I walk into a place with a thumbs up and they respond in kind. Many places aren't asking. I could be wrong but I think this will be short lived; maybe three months.