New article saying they've "suspended operations" of the chapter:
http://www.mysanantonio.com/news/loc...ng-6872476.php
My only guess is that it's a small ranch, with neighbors close enough to hear and be concerned. That part of S. TX has some huge ranches, but many are being broken up into "ranchettes" that have a regular HOA and laws like small cities and communities.
Also, keep in mind that area of the state is close to Mexico and people are on higher alert near the border because of the continuing violence that has happened on the other side.
Agree that it's (obviously) a horrible idea for a fraternity function. But, not technically illegal - IF they're on a larger piece of private property.