Jerry Threet, San Francisco' deputy city attorney, says that SROs are "often the last barrier between SF’s poorest population and the streets". Threet says some SRO owners do the "bare minimum to maintain their buildings", leading to unsafe SRO units. In 2014, City Attorney Dennis Herrera sued the owners and managers of 15 San Francisco SROs for "pervasive violations of state and local laws intended to protect residents’ health, safety and tenancy rights". Herrera alleges that the SROs harass or otherwise push out SRO tenants before they can get 30 days tenancy, which gives them protection, an action nicknamed "musical rooms". He also alleges that the SROs either do not do repairs of their units, or do repairs without permits and without licensed, qualified contractors.