These are great responses.
I myself don't broadcast that we're unvaccinated (whole family) to people, especially if I know they do. Luckily my dd's school has a mixed population of vaccinated and unvaccinated children, so people aren't likely to even bring the subject up.
No matter what, just know that you're doing the right thing. People often don't want to argue with you if you're confident in your choices.
But I can see how it's a touchy subject....