[Modernman]

Besides slapping God in the face (artificial contraception is like binging and purging, except this is "binging and purging" with the greatest human power, the ability to co-create children with God),

If there is a God, that slap to the face is between them and Him.

the implications for society are obvious

A statistically insignificant percentage of people choosing not to have children really makes no difference to society at large. Furthermore, I would wager that DINK couples contribute more to society than they take out, financially-speaking.

In any event, the only reason we are particularly concerned with birthrates is because we have set up the social security pyramid scheme. If it wasn't for that, all we would really need is a replacement level birthrate, and we are close to that right now. We can make up the difference with (smart) immigration, if need be.

[AppyPappy]

Furthermore, I would wager that DINK couples contribute more to society than they take out, financially-speaking.

Yeah but they only do it in one generation.

[Aquinasfan]

A statistically insignificant percentage of people choosing not to have children really makes no difference to society at large.

Really? What about couples who decide to have only one child, or two? These people are of the same mindset, and their numbers are not statistically insignificant. We are now below replacement level, excluding immigrants.