Hi All,
I only had my garage door open once on its own. And that time it was due to my dad driving by my house and he had the ST SmartSense presence device.
I reaffirm my recommendation from my own Project Post. Use a Smart Outlet to turn off the garage door opener completely when not in use. This will protect you from the Zwave relay misfiring and some one with a frequency blaster opening your garage.
community.smartthings.com/t/garage-door-automation-with-linear-rellay/5975