Leave cabinet doors open?

So I read on House Beautiful that leaving doors open is a design secret.  But wouldn't the doors warp?  It looks good I guess but not sure I am sold on it being a design secret.

House Beautiful

There were lots of secrets too such as piling on the pillows, skipping the sofa and mixing styles that I totally agree with.  Using a real rug in a bathroom and painting the walls dark to make a room look larger were some others that I wasn't too sure on.

Click here to see the full photos - lots of great ideas!