Sounds like Monty Python
Why? If it is made from thorny bushes, poison ivy, Venus flytraps and the like [and liberally infested with poisonous snakes and spiders], it might work.
Its entirely in keeping with Mexican historical data. Historically in Mexico and the southwest, it was common practice to plant hedges of prickly pear cactus around wheat fields, gardens and ranchos too keep out animal and human marauders.
My first thought was "who are they gonna get to trim the hedges?"