Thats an unfair statement. Its not an individuals responsibility to come back for the sake of their corps, if they want to be there they will, if they dont, its their choice. Paying out two grand for tuition (then not to mention travel costs which are horrendous) I will march where I want to.
Its a personal decision, not one that should be forced on by vets of the corps past. I was given the opporunity to march with Crossmen when Cascades folded and its one of the best things that could have happened to me drum corps wise. If I had the option I would have marched with Crossmen every year, but that would be my decision.
You also have to see the perspective of knowledge. If you have the opportunity to march for different corps and get instruction from many of the top instructors in the country its only going to make you a better more rounded musician, which i think learning how to play your instrument better is also something this activity is about.
Its all personal opinion, not something anybody should have a say in except the person making the choice.
That being said, GO BONES!