I have worked in both public and private schools and in both cases, all I have ever cared about are the kids that wanted to be a part of what we were doing. You can't fight the poor advice, instant gratification and love of being recruited that many in this generation desire, but in many cases, kids are just doing what they feel is best for them with the support of their parents. If a kid is no longer interested in your program, wish him well and then focus on the kids that do want to be a part of what you are doing. They deserve your full attention and enthusiasm.