Swags are window coverings and have been around for YEARS.
These people must be insane.
http://www.plowhearth.com/grayson-floral-duchess-swag.htm?aff=6443&gclid=CKbn3qms9MICFZPm7Aodul4A8Q
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“Swag” is an internet slang term often found in comments, discussion forums and image macros used as a synonym for “swagger,” a type of style or presence that exudes confidence and is sometimes interpreted as arrogance.
http://knowyourmeme.com/memes/swag
Are you referring to the swag alone at the top of the window?
That was a common way of decorating a window, back in days when people needed as much natural light coming in as possible...
-JT