The 4th District Court of Appeal ruled Wednesday that the injunction violated Derek Logue's free speech rights and did not meet other Florida legal requirements.
The injunction barred Logue from several forms of contact with or proximity to Democratic state Sen. Lauren Book, a well-known supporter of strict offender laws involving child sexual abuse.
Logue had protested Book's appearance at a children's march in Tallahassee. He also criticized her publicly at a New York film festival and through social media and blog posts.
A lower court granted the injunction, but the appeals judges found Logue's conduct fell short of the legal definitions necessary for one.
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