Yet, when given a chance, trendy "atheists" will create their own ritualized activity:
Atheists choose 'de-baptism' to renounce childhood faith
Interesting that, when "atheists" wish to make a point, they use religious symbolism, albeit in a contrary sense.
Of course the easiest way to "de-baptise" oneself is to simply live outside the baptismal covenant. That may be too logical for non-theists. Surprising, considering they claim to love reason.