Any person who enters a school with the intention of doing harm should be taken down by any means necessary. The man catcher is a device that has been used for centuries as a way to restrain criminals without injuring them. This device is already being implemented in Japan with much success. The Us would do well to include the use of this device in schools and provide the proper training for teachers to use the device.
No, schools in the US should not purchase and train their teachers in the use of the 'two pronged man catcher'. The man catcher is a painful and demeaning tool that pins people and renders them helpless. Physical force and contact should not be parts of any school's policies for dealing with students.
No, schools in the United States should not purchase or train their teachers in the use of the 'two pronged man catcher,' because teachers are not law enforcement personnel. This device is used to capture and detain an individual. In the school setting, its primary use would presumably be to detain an intruder in order to protect students from harm. However, capturing and detaining individuals is a job for law enforcement or for security personnel on staff at the school. Teachers should not have to actively engage with violent intruders or otherwise put themselves in harm's way; that is not part of their job.
Schools are relatively safe, and taking time out to train teahers in the use of this rediculous device only takes away valuable time that can be spent teaching or spent making them better teachers. It is not a good idea and if it is implemented on a wide level it will backfire.