We have children in this building. We have dozens of residents who stood in front of our apartments astonished at being targeted, watching the helicopters circling in the moonlit sky. We have everything in common with people who oppose police brutality and support police accountability. We are old and young, we are black, white, Latino, Asian, and pacific islanders. We are a rainbow community with stories of our own about police misconduct.

What do masked protesters prove with broken windows? What message is sent by smashing a grocery store, a yarn store, or even the local Wells Fargo branch, which is right under my neighbors' apartment homes?

I'm not someone who has not marched, sat in, gone to jail. But I will not provide cover for cowards who exploit a peaceful effort to join the united national voice against police corruption at a crucial moment. Broken windows might catch a photographer's or reporter's attention momentarily, but whatever ambiguous message vandalism sends is not nearly as powerful as numbers, which masked vandals never seem to master. Peaceful, nonviolent tactics don't just sound nice; they are the practical path to change. With a perspective, this is Carol Denney.

Carol Denney is a community activist, musician, and bike commuter.This commentary ran on KQED's Perspectives series on December 10, 2014.