We have security gaurds and company operators 24/7 but this particular field is the size of a small city. It's not possible to watch all of it all the time. Typically trespassers are just bums on drugs or looking for something to steal. Running regular security checks keeps them at bay since they don't like to be hastled and there's not really anything profitable for them to steal. This was more targeted but there's not much they can do at the peripherals to cause a serious danger to the public. More than anything they're endangering themselves around heavy machinery that starts automatically and poses life threatening dangers to anything made of meat.