The American Civil Liberties Union sued Polk County on Friday, saying the county's policy to use the free speech zone is unconstitutional. The lawsuit, filed in federal court in Tampa, alleges several elements of the policy violate First Amendment rights, including a rule that requires users of the site to have a $500,000 insurance policy. The lawsuit comes a week after the county officials denied the ACLU use of the site because it did not provide the insurance. ``The real problem here is that (the county) has set a policy in place that purports to create a free speech zone,...