One problem with lying to get your kid into a faith school is that you are severely disadvantaging your kid by sending them to a school which will teach them myth as truth and which will make them bow their heads to a deity they must not question. So a very large chunk of their time will be spent in enduring anti-educational "lessons", chanting "prayers" and going to services. If it's a Catholic school they will spend every lesson under the sightless gaze of a sparsely-dressed brutalised dead man hanging on a cross on the wall in front of them. Another problem is that you will depriving a perfectly good state school and its pupils of your child's talents. When enough people do that, and they do, the system is thrown into imbalance. I'm scratching my head here wondering whether anyone who approves of this kind of discrimination can really be called "Christian".