More and more families are willing to go to any lengths to get their children into the right schools, even if it means crossing the line between right and wrong. Boundary hopping--falsifying residency status to attend a particular school--has been around for years. In a handful of states, it has been alleviated by open enrollment, choice programs, and, to a lesser extent, charter schools. But in a number of top school districts, many of which are already at or over capacity, it continues to be a problem. Early morning drop-offs, forged signatures, and fake documents are just some of the methods sly families use to enter districts where they do not legally reside. Their reasons are just as varied, but it is clear that school districts, education agencies, and even municipal governments are cracking down. This article discusses parents' reasons for boundary-hopping and the concerns of districts faced with boundary-hopping problems, and describes some of the methods being used to curtail the practice.