They are hurting themselves, the more you cheat the harder it is to have the work ethic to do things later in life. Honestly youd in a way be helping them by telling on them, but i dont know enough about them to know if theyd give you trouble or it.
http://www.gonintendo.com/?mode=viewstory&id=195451
Says best buy may not get it till Wensday, GameStop Friday, and amazon has to wait on manufacturing delays.