Immaturity in the NBA

This past month DeMarcus Cousins was suspended indefinently by the Sacramento Kings after yet another argument/confronatation with a teamate.  Cousins who was the 5th pick in the 2010 draft, had character concerns coming out of Kentucky, but the Kings decided to take a gamble on him. This has paid off with mixed results, as he is averaging an impressive 13 points per game to go along with 8 rebounds, yet he has continuiously argued with the coaching staff and conflicted with teamates.  This brings about the idea that there should indeed be an age limit implimented when David Stern sets up the new Collective Barganing Agreement.  You can argue that Cousins, is just like any other 20 year old kid. If thats the case, then he shouldn't be thrown in a situation where he is the "face" of an organization recieving a 7million dollar contract.  If the NBA formulates a system where players will have to stay in college for at least 3 years (or be 3 years removed from H.S Graduation) much like the NFL, there will be alot less problems concerning conduct of younger players around the league.  While Cousins is an obvious special talent, he will have to mature mentally as well as physically if he wants to last in this professional league, as he is already the topic of numerous trade rumors just 4 months into his career.