I'm actually not a fan of these, even though they are "anti-abortion". Not sure who wins by making memes of potential people acting in pleasing ways towards you. It reduces the position to consequentialist trash and is quite an unfunny/incorrect way of expressing the position.
They seem to be effective in small doses. Singling out more emotional ones and spreading them in random places can convert a considerable amount of people. Just don't dump them in droves, joke about them or try to seriously analyze them.