Where have all the "Crop Circles Gone?"

So I was riding with a couple guys back from work, and we decided to do a prank on a friend. We were going to do mini designs in his dirt. Then it came up that it was going to be like crop circles, but then we thought we haven't heard anything about crop circles in years. I brought the fact that we all have cameras now, and the people doing them would get caught, or if you really believe in aliens. Where they just alien juveniles who have now grown up, and out of the crop circle game?