We get lased from time to time--I have been. The context wasn't a riot--I was just in the area and somebody painted me with a red laser.
Police helicopters seem to get lased often based on newspaper reports. Those fools actually get caught and sentenced to years in prison.
Frankly, I agree that a laser is among the least worrisome things to deal with in a riot. By the time you have considered snipers, molotov cocktails, gasoline soaked rocks lit on fire, cherry bombs in glass bottles, frozen water bottles and fruit, slingshots shooting marbles, nail studded tennis balls, urine (or chemical) filled glass bottles, paintball guns, sticks and metal bars and politicians, prosecutors or police chiefs siding with the rioters against officers on the streets, I'd welcome a laser.