lol @ the countermeasures being high tech lasers. Spray them with water or vegetable oil. Water is easiest - just use a high pressure hose to knock them out of the sky / potentially break flight-critical components. Oil requires some special equipment but would presumably ruin the propellers/rotors.
And what happens when the Prez, PM or Pope is at a rally and 10+ UAVs at the size of small birds start buzzing around? Remember, they are people around, even the sniper has to worry about what his bullet will hit next.