Do you have "tourist" students in your school? I'm not talking about students who are trying multiple styles/instructors to see what they like - I'm talking about students who have been around for a while - several years at least - who travel from class to class, often within a style or organization, often rotating through a set of instructors over the course of 12-18 months, and then repeating, leaving every time someone suggests they test - not once, but repeatedly. What is your opinion of such students?