Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: We have a big family. Every year, the whole tribe comes to my house, since I have the most room, and I make the best turkey (spatchcocked and smoked). 

There are usually upwards of 30 children at my house for this event. 

My sister has gone down the YouTube rabbit hole, and is now an avid anti-vaxxer. Last year, she spent the entire day berating any of us who vaccinated our children (all of us). 

Between then and now, she has announced via Facebook that she stopped vaccinating her kids. 

I don't feel right putting my children at risk, or the rest of the kids at the dinner for that matter. So I told her she would not be invited to our house this year unless she showed me up to date vaccination records for her kids. 

90% of the family is ok with this. But we've got a couple of people who don't think it's a big deal. They tell me I'm over-reacting. I should just let her bring the kids, and not "break up the family over something silly". 

I'm not budging. If those people want to have her at their Thanksgiving dinner, they can have their own dinner, somewhere else, without me. She will not be allowed in my home with unvaccinated kids. 

So, AITA for putting my foot down, and refusing to budge? 

banning my sister from our Thanksgiving activities