Gander Mountain periodically sends me hunting and fishing tips from their pro staff memebers. Here's a hunting tip from Pro Staff Manager Mike Kurre:
The best reason to build a mock scrape is to draw a buck into range and hold him there for the shot. Once you find a spot with a low hanging branch within range (archery or firearms), kick out the grass or weeds with your rubber boots in a 2 foot circle. Using rubber gloves, scar up the branch over your scrape and snap one tip so it points straight down, but don't break it off completely. This will create a "worked over" look. Then add a scrape dripper with estrus scent and you’ve created your own mock scrape.
Mike "Cold Front" Kurre
Pro Staff Manager