If you are referring to the term "poaching" its simply ridiculous...every team is looking for the best players. There are no rules here unless you would like to make them up and post them on the site for all to agree. Every parent has the opportunity to say yes or no to any offer made to them about where there son may play. No one forces any parent or player to play on a team it is an offer that is entended either after a tryout or when an opening happens. Its a free country and as far as I know no club has a policy that allows them the move players without there consent. So enough with poaching, generally speaking most people leave the team they were on for a better opportunity just like you would do with your job or any other chance to better yourself or your family.