In Planned Parenthood Shasta-Diablo, Inc. v. Williams (1994) 7 Cal. 4th 860 [30 Cal. Rptr. 2d 629, 873 P.2d 1224] (Planned Parenthood I), this court upheld an injunction limiting the protest activities of petitioners, anti-abortion activists, to the sidewalk across the street from a women's health clinic operated by Planned Parenthood, Shasta ....