That's bad, but it's not just that: it's a crime, and also a tort. No security company that allowed its employees to pepper-spray nonviolent people on public walkways --- or, really, anywhere --- could long remain in business.
If something like this is actually happening, Google's opponents don't need to generate outrage. They just need to get onto the streets of Venice with cameras, capture it happening, and help the victims make criminal and (lucrative) civil complaints against one of the largest corporations in the country.
What am I missing here?