No microsoft points cant be shared. I mean it cost $10 to buy 800 microsoft points to change ur name, or $20 to buy 1600 points to change ur name twice. U can buy the 800 points from microsoft/xbox only online, but u can buy the 1600 points from bestbuy for $20. I am getting the 1600 from best buy. Or as a cheaper way have everyone on ur friends list or anyone u meet in matchmaking leave bad name feedback. After 50 people leave feed back u wont be able to sign into live until u change it to something else, And its free!