Absolutely. The effective hog trap consists of a temporary pen, an automatic feeder and a remote control gate. The pen segments have to be hauled onto the site, and a partial pen set up and the feeder programmed. several days of feeding with a partial pen, and then a full pen is set up, but the gate left open, and several more days of feeding and remote observing to see how many of the herd go into the pen. When you've achieved the maximum, you drop the gate and shoot any hogs too wary to get in the pen. Then shoot the ones in the pen before they break out.
The upside is that you get rid of a lot more of them than you would by hunting. The critters reproduce prolifically, and hunting just doesn't get rid of enough of them. They are a serious pest in the agricultural areas of south GA and do significant damage to crops. A more efficient method is needed rather than just hunting.
Have they ever tried hunting with no limit? I have a hard time believing that the hundreds of thousands of hunters in any state who would take advantaged of this wouddn't be very efficient, if not eliminate the hogs entirely. Most times I've seen trapping pushed it's always by the anti-hunting element as a more "humanitarian" alternative.