I personally know a man from our country who served a mission but was not worthy. I don't know how could he serve a mission? Although , his girlfriend was pregnant before he received his calling, he went on mission. After his mission, they got married in the temple (assuming that going to the temple is not affordable for us if we don't benefit a financial help program from the Church). Then, he became a church leader. At that time, I always wondered why God let those things happen. But, lately, I've heard that he was excommunicated and became non active in the Church. So I think, sooner or later, God will punish us if we don't repent. We can lie to our leaders but we cannot lie to God.