Used their riot shields to protect them from the bricks, and wait for a third party to arrive
LOL, great idea. And how about the gas bottles set afire? Shield? How about you stand with a plastic shield in your hand with bricks flying all around you. We'll tell your children daddy died waiting for a third party. That third party would have been state troopers or the guard and neither group would have tolerated that behavior nor should they.
Come on Machine, you're a much more intelligent individual than that.