More than likely the thieves are people who have worked in the industry so they know how a typical apiary operates and what common security measures are being u

More than likely the thieves are people who have worked in the industry so they know how a typical apiary operates and what common security measures are being used. Like any professional, professional criminals focus on crimes that fit their skill set to minimize legal risk and maximize profit. I'm not saying that people who are stealing bees are ignorant or inept. Obviously they're good at what they do or it wouldn't be a problem but we shouldn't assume they're good at all criminal activities. No matter what security measures you take there's always going to be ways to bypass it. Security measures are never a solution to threats but part of a process to minimize the threat. Something like GPS trackers can obviously be defeated but would help mitigate the threat of less skilled apiary thieves thriving on the low hanging fruit of unprotected apiaries. Getting caught using a GPS jammer carries a severe criminal punishment, far worse than just stealing bees. It's a high risk crime that requires technical expertise with major repercussions if you get caught. Criminals that have that level of technical expertise would probably concentrate on more profitable crimes than stealing bees. The goal is to increase the risk of the crime to help minimize the number of people who would attempt it, then concentrate on the few who's left. Security is an often vague process but this is how all security systems work.