Just my personal opinion.
Locators are good at the job they do (well most of the time) no one doubts that. If I was ferreting on the yorkshire moors I would probably have one. The only problem I have with the locators is, the indescriminate use by amauter ferreters who are just doing it as a hobby, but have neither the field craft or the sense or responsibility to use them correctly.
I have always been a hobby ferreter, never claimed to be anything else. If I lose a rabbit out of a net, or a ferret kills and I cannot retrieve the rabbit, so what, personally I dont give a feck! However,