At what point does passion become wrong?

Just thought I'd get some feedback from the players out there - at what point does passion for the game become an addition? If you don't have motivation to do anything else? If you still do some things but don't leave the house?

Also, can one be addicted to chess? 

Interested to hear your opinions... thanks!

https://www.youtube.com/watch?v=LO1mTELoj6o

I don't think anybody knows what an addiction is until he/she stops doing something that he's addicted to.  I've had such an experience.  You dream about it; you feel lost; you are dying to experience it again; you regret not having done more. You still keep in touch with your old buddies and follow up on things (just in case you get back in).  After about 8 years, you get over it.  You don't bother following it; you hardly talk to those friends who you realize were all addicts like you.  Then you fear it; you want to get back in but you fear it.  So you talk big during the fewer and fewer times you meet up with your old friends, and say that you'll get back in, but you fear it and worry and scared to do it again.  You've lost it forever.

BUT no worries, other fun things pop up in life to replace it.  Hmmm, but you'll still think about it once a while, just don't dream about it anymore.

If you stop making time for important things like:

your health, your relationships, your job, then your behavior is a problem / addiction.

I like what mgx9600 begins with. Try stopping for a week, or a few weeks. Don't ask yourself the question "could I stop for a week?" because you'll surely answer yes. I mean actually stop for 7 full days.

If it's really difficult to actually do this, then your behavior is likely a problem (unless the behavior is something that helps keep you healthy, in a good relationship, or in your job).

When it harms you in some way like godofhell said.  If it impacts your health, family, finances, or job in a negative way then it would medically be considered an addiction.  Until then you just have people nagging you about something you like to do.  

All good thoughts. The gist of what everyone seems to be saying is it becomes an addiction when harm is involved. I think people define harm in so many different ways. and mgx9600, sounds like you have an idea of what addiction really is like. I'd know...