I had my children christened. I support local traditions and older family felt more comfortable with it.

Well I refused to allow my two to be christened and I met with huge condemnation from certain quarters in my family (they're in their 30s now and I still receive criticism to this day). They both attended religious instruction lessons at their (non-faith) schools, the law of the land (we could have withdrawn them, but that would have made them into outcasts in the eyes of their peers - another non-benign effect of faith...) Your point about supporting local tradition is harder to counter by us atheists. We don't have clubs or churches, unlike big religion. I allowed my son and daughter to join the Cubs and Brownies, which at the time started their weekly proceedings with an enforced bout of head-bowing. Religion survives by existing as a not-so-benign tumour inextricably bonded to society. That is deliberate, and it wouldn't survive any other way. I can't be dishonest and sit here pretending that good things can't sometimes come from this, but there are plenty of bad things possible as well, intellectual stunting being one such. My children were exposed to religion but were never of it. They always knew that they could decide to have themselves christened when they grew up. It is an option that neither took up. Am I pleased? I don't give a damn. What adults do in that regard is their business, their right. Get it, Jack?

It doesn't make them Christians. They couldn't speak and ga goo isn't exactly informed consent.

Maybe not, but you made an awful lot of promises on their behalf.

Another local tradition is Morris dancing. Those who introduce their children to that tradition don't to my knowledge say their kids buy into ancient fertility and harvest assurance.

False analogy. Morris dancing is peripheral to society in a way that religion never is. No-one is going to excommunicate you, ostracise you or threaten you with hellfire if you give up morris dancing. There is no holy book or body of theology attached to morris dancing. You don't have to deny evidence in order to be a morris dancer. Practising morris dancing does not tie you to ancient fertility, etc. Maybe you need a slightly better analogy, eh?