FYI, NOT all Christian schools are like this. Nor are all Christians!!! I went to one for a year (moved away after that due to family's military transfer), and I can tell you it's a mistake to assume that attending such a school automatically makes you a fundamentalist nutball like this.
But Brent hits on a good point. With any private school, secular or religious, the parents had a choice on whether or not they were going to send their kids there. The parents have made a decision to spend their money there and they should have done their research to know if that was something they could abide by or not.
While I would ideally like to get a Christian education for my children whenever I should have them--I also intend to do my research. I want a strong curriculum, to include science, and I do not want fundamentalism rammed down their throats. There needs to be tight discipline (i.e. no tolerance of any form of bullying, insubordination towards teachers, or other things of that nature), but I think something like this goes way too far. I can tell you that had I seen something like this in the school's rules, I would not send any (hypothetical) children of mine there.
If you're going to send your kids to a private school...interview the teachers. Ask the tough questions. Talk to other parents away from the school (and know what the parents are like that you're talking to). DO YOUR RESEARCH. If you don't...well, that's your fault for not asking the right questions.