I would take a position on responsibility more seriously if the Christian community were as interested in rape, spousal rape (which is usually discussed as "Her body belongs to me according to the bible" on this board), sexual abuse and incest.
It would be nice if there were as many adament Christian groups, leaflets, sermons, enthusiasm and devotion to bringing to the open a culture (which includes if not is typified by aspects of current organizational Christian denominations) in which women and their bodies are defacto perpetrators due to "male desire".
It appears however that the church has decided that men are somehow by nature uncontrollable, but perhaps women are. That the potential for life (or a few spliting cells) is presented as sacred, but guarding the quality of it is not.
And while my legally married partner and I are not likely to have an abortion as it would cost us thousands to get the anonymous sperm in the first place; I would not stand up as Christian and demand to make other people's choices for them, while avoiding the responsiblity of the consequences. The US has the highest number of children up for adoption in the western world, the highest per capita, the highest unwanted pregnacy rate. There are couples, gay and straight, throughout Europe and Canada begging for children to adopt, but the US will not allow that to happen. Nor, does the prodominately Christian population seem to have a solution to the over 1/2 a million adoptable children already in the system except to repeat "not on my doorstep".
If you wish to "solve" what you do not want other people doing by making it illegal, why stop there. I am sure making out of wedlock teenage sex illegal will be just as successful in eliminating the occurance of teenage sex (as in, not!), and can replace the current effective Christian policy of "good girls don't" which is then followed by putting the hands over the ears and going "la la la la la la I can't hear you, la la la" when the stats continue to roll in (like how a "silver ring thing" pledge is MORE likely to end up getting you with....tada an unwanted pregnancy).