FCC Reserves the Right To Search Your Home, Any Time
This is an urban myth.
Student Faces Expulsion for Blog Post
You might want to go sit in on a Constitutional Law class, where it will be explained, in minute detail, why you're wrong when you think you're right. The short answer is that the words of the Constitution don't always mean what they appear to mean. The long answer is that this sort of behavior by the school district has long been held to be unconstitutional, going back at least to Tinker v. Des Moines School District: