No biggie, just create something to deflect/interfere with the beam, say a device that acts as a shroud over/in front of the lens, etc. Something with one way capability in order for the operator to continue using his lens. Some creative soul will run down to Canadian Tire and jury rig something for $1.25 using duct tape, rubber and a bit of a veil. Who knows, not to mention, any volunteers to be the guy standing on the roof using this device since the "beam" will be "visible" to many fun loving snipers/helicopters/missiles for miles eh ;D