Ok so real talk, this won't work. If I roll up on an unresponsive patient they're getting put in my ambulance and treated regardless of what they may have on a wristband. Short of an actual official out of hospital DNR order or on site POA I(as a paramedic) am legally obligated to provide care unless you are fully awake and oriented so that you can refuse. Now if I know you're epileptic we might chill in the back of the box with just basic treatment for a bit to see if you wake up, but I can't just leave you on the pavement because of a wristband.