A couple things about the zombie march:
1) A zombie march is an annual Halloween event in several cities where traditionally people dress as the undead and march through downtown for maybe a half hour or so. It was never intended to include bar-goers crowding the streets like a block party, much less the handful of drunken fools I saw littering Main Avenue with knocked-over trash cans and broken glass, as well as taunting the originally peaceful and patient police.
2) Were pepper spray and nonlethal rounds needed? Not for most, but there were a few asking for it.
3) When an officer, in riot gear or not, asks you to get out of the middle of the street, you should probably do so. I did.
4) Police brutality is a real thing that happens all the time, and a good portion of it is against people who are standing up for what they believe in through peaceful protests. It seems pretty offensive toward those who actually are victims to have a bunch of spoiled brats cry wolf after putting themselves in a situation where they should have had common sense enough to go home when they saw the event start to turn sour.
Try being accountable for yourselves for once in your lives, please.