Dig a moat around your house. Fill it with alligators. Never look back.Basically.
"Our choice about if we circumcise or not is none of your business, stop sending me opinion pieces off Facebook and let me read the medical studies in peace."
"We don't use fingers as teething toys or pacifiers, stop telling me how much better it would be if we did, that's so unsanitary."
"I gave birth last week, no I don't want to go for a walk, stop asking."
"I don't care if breastfeeding gets easier after 6 months, I like bottle feeding and my long term goal for a hypothetical second child I likely won't have, and may not even be able to breastfeed anyway because I couldn't with this one, isn't going to change just because YOU think bottle feeding is inferior."
"Stop bringing Colin to my house, he's not welcome here and you know that."
You get the idea.