This technology is 15 years old.  With advances in software and robotics more effective versions should be develop-able.  Seems like every school these days has a robotics club and even competitive teams.  Perhaps the state should offer a $100,000 prize to the school that develops the most effective version, deadline 12/1/2017.  No it will not end the problem but will help to control it at least a little.  Plus all those roboheads will have a very practical problem to solve.  http://archive.wired.com/gadgets/miscellaneous/news/2001/10/47156?currentPage=all