If you think you need GPS than you need to fire your untrustworthy technician or two. Don't handcuff your entire work crew because of a few bad seeds. Its too tempting to use this tool as way to pester your technicians, leading to instant resentment of your team. So go ahead implement the GPS units and watch your moral tank faster than our stock market.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.