My grown up son, a staunch Atheist, calmly, disapproves that he was christened. He thinks babies have no say in this and wonders what the point is, that it's all for a vacuous show.
In his christening video, the vicar annointed his forehead with oil and said, "this is a badge, that will always be there, long after the oil has worn off, saying that you will always be part of the Christian family". That really pissed him off.
Every now and again, I remind him of his invisible badge, just to wind him up 😀.