It's one thing to wear a ring, but another thing to wear it on your wedding finger. If you wear one on your wedding finger and your not married, then what does that mean?  Is that a way of warding off guys (or gals)?  Well, whatever.  I accept different customs of the world.  If there is society that sees this as common and normal, then I'm totally fine with that.  I didn't mean anything bad by the initial comment I made.  If she's married, good for her.  If she isn't, great.