Many is the time I was raiding Molten Cord (40-person raid) and stopped to nurse my DS and put him down to sleep. My guild at the time even had a set place that they knew I was going to go and put my DS to bed, and it was an understanded and accepted part of my being there.
I often can't do instances because I can't commit to the time (and attention span) it takes. But both my kids were nursed at the keyboard while I was playing.

MY BIL has played to addictive levels and to the detriment of his marriage and family. It certainly can happen, but often there is a co-dependent relationship that is bolstering the addiction. Not always, but certainly the dynamics of the enabler/addict can come into play.
DH and I have played since release and we've both found the urge to play waxes and wanes. We have never neglected our children while playing WoW.
Follow Mothering