A bunch of lefties that I go to school with insist on calling pro-life "anti-choice." I respond by calling them "anti-life." Makes sense.
Have you ever seen the Associated Press style book? It won't let journalists use the word "pro-life" when refering to pro-lifers. They must use "anti-abortion." Fair enough. But then will they call the other side "pro-abortion"? Not on your life. The AP stylebook insists reporters use "pro-choice." And they must always refer to abortion as "abortion rights." If a reporter veers from the code book, copy editors must correct it to the AP Style.