If the kids that did this wanna impress me, here's what you do, get bulldozers, heavy duty trucks, and couple of cranes. Go to a hill or mountain dig up large boulders and bring them to a field in a rural area. Place the boulders in the shape of a swastika, afterwards clean up the area of tracks place mats of grass over the damaged stuff and get out of there.
Sooner or later a satellite will take a picture and add it to google maps or other satellite map services. Post the picture on your troll account and enjoy watching them try and remove those boulders.