Shavaun Scott is a psychotherapist, MMO player and a well balanced voice about problems related to adiction (4 part video):

http://www.youtube.com/watch?v=8U1T9ZumALk
http://www.youtube.com/watch?v=dY2sdr5QOzA
http://www.youtube.com/watch?v=QoDLN6gGd_g
http://www.youtube.com/watch?v=esJi4YfGKyk

/discuss