The home button on the Surface Pro 3 can turn out to be annoying, since there's a possibility that you may touch it while using the device as a tablet. Although it's not a widespread problem, there's a way to disable it temporarily.
The folks at Neowin recently shared a guide to help Surface Pro 3 owners disable the home button. Just follow some simple steps below, and you'll be done in a jiffy.
First of all, open the Windows Device Manager, simply search for it using the Charms bar on your device, and select "System Devices." From the list, select "Surface Home Button" and go to it's properties. Go to the Driver tab, and disable it.
This should solve your woes of accidentally touching the home button by disabling it entirely. In case you decide to turn it on again, simply follow the same steps, but choose "Enable" from the Drivers section.