Yes, it is. We develop a taxonomy of consumer drones and generalize safe-hijacking strategies for each consumer drone type. You can check the detail in the paper.
Ultimately, traffic management system for drones is required to mitigate GPS threats on legitimate consumer drones in our opinion. The National Aeronautics and Space Administration (NASA), the Federal Aviation Administration (FAA), and companies such as Amazon, Boeing, and Google have already begun developing an Unmanned aerial system Traffic Management (UTM) system. Under this system, drones will register their trajectory to the UTM before their flight, and the UTM will track every moving drone in low-altitude airspace. If one of the drones moves in a different trajectory from its registered trajectory, the UTM will determine that something is wrong with that drone and directly control it to prevent hijacking through GPS spoofing. Further, a GPS threats detection system can be integrated into the UTM, enabling the UTM to provide GPS jamming and spoofing avoidance services. There are several effective spoofing detection methods. By applying them to the ground stations of the UTM system, the UTM system will successfully detect GPS spoofing threats and make drones activate GPS fail-safe or change their trajectory to avoid the threat.
Before answering this question, we want to say that our experiment was conducted with government approval :)
In general, it is illegal to generate wireless interference signals, but some countries restrictively allow it on special purposes. For example, federal authorities, including the United States Secret Service, operate equipment that can jam cellphones and other wireless devices to prevent terrorism (site). In Sweden, the use of radio jammers is allowed in the armed forces and prisons (site). 70 units of "DroneGun Tactical" product, equipped with GNSS jammer, were already exported to a middle eastern country and the company is waiting for US approval soon. This means that increasingly more countries are trying to adopt radio interference, worrying about drone threats (site). Thus, we believe that safe-hijacking via GPS spoofing could be allowed to guard critical infrastructure if it turns out that GPS spoofing is an effective way to disrupt hostile drones and its interference could be minimized.