My son ISN'T an addict, but he is a teenage dunderhead (said with a smile and love). He's been given many expensive gifts over the years, playstations and mp3 players, that he didn't appreciate, traded away, treated like garbage, etc.
This year he's getting winter boots. He will only get practical gifts for the next few years until he grows up and stops taking things for granted.
Just so you all know that many parents deal with this issue - we want to spoil them, but it's not really in their best interests.