> Grace Marsh, a Jehovah's Witness, attempted to distribute religious literature on the sidewalk near a post office in Chickasaw, Alabama. The Gulf Shipbuilding Corporation owned Chickasaw, Alabama in its entirety as a company town. Marsh was convicted of criminal trespass. Appealing her conviction, Marsh argued that the state law violated the First Amendment.
[snip]
> In an opinion by Justice Hugo L. Black, the majority ruled in Marsh’s favor. The Court reasoned that a company town does not have the same rights as a private homeowner in preventing unwanted religious expression. While the town was owned by a private entity, it was open for use by the public, who are entitled to the freedoms of speech and religion. The Court employed a balancing test, weighing Chickasaw’s private property rights against Marsh’s right to free speech. The Court stressed that conflicts between property rights and constitutional rights should typically be resolved in favor of the latter.
And, because Silicon Valley is in California:
https://en.wikipedia.org/wiki/Pruneyard_Shopping_Center_v._R...
> A state can prohibit the private owner of a shopping center from using state trespass law to exclude peaceful expressive activity in the open areas of the shopping center.