Going to have to respectfully disagree with you, Danth, about whether video games can be addictive.
EQ in particular had a storied history in the late 90s, early 2000s of causing divorces, job loss, and allegedly in some cases even suicide for those who couldn't control their playtime.
Any activity that gives dopamine hits (and EQ does) can become addictive to certain individuals. Not all folks have the same internal chemistry so the same behavior between two people could lead one to become addicted and one not to.
At the end of the day it can be a serious thing if it gets too deep or too dark.
In those cases, once a players notices this may be happening to them they really should get out of Norrath as soon as possible. A good long break works wonders.
Here are some articles about EQ addiction:
http://www.nickyee.com/eqt/addiction.html
https://www.wired.com/2002/04/did-ga...le-in-suicide/
Bottom line: If your son or daughter came to you and said they were addicted, it wouldn't matter what it was they were addicted to. You would help them.