There are statutes on the City of Kennewick books that require permits for a variety of events, those that involve parades, marches, protests or stationary large group gatherings. No permit was sought or given to legally allow the event to take place.
The Mission Statement on the page says: "The purpose of this group is to raise awareness of local businesses that might need help protecting themselves and their business. Invite those willing to help."
Zoning laws aren't captivating or 'fun' but builders and developers are watching this one closely. Very closely as are city planners. Proposed law would mix multi-family units with single family homes--even apartments.