RCs even think JWs are Prots, though they operate more according to the RC sola ecclesia model for authority, but its a bit early yet, and if it were not for evangelical types most RCs threads would never make it past 12 comments.
As re this, while being much more conservative overall than Catholics, evangelicals did miss it on this one, partly because the link btwn abortion was and still is little known.
Apart from that, I believe self control is the means by which reproduction is controlled, and not by synthetic means. And if married, conservative Christians should be the ones with the largest families. The use of the Pill has had an unseen by profound effect on society, besides conservatives costing elections.
I don't believe I've seen any arguments likening birth control pills to diet pills (i.e. appetite suppressants, metabolism boosters, carb-blockers, fat-blockers, etc.). Most doctors will tell the person wishing to lose weight to change eating habits and not rely on a pill. Funny how that doesn't translate to sexual behavior. If you don't want to get pregnant or don't want to pick up a disease, ABSTAIN.