Final answer:
The 1997 Supreme Court ruling in Reno v. ACLU found provisions of the Communications Decency Act to be unconstitutional due to its non-neutral content stance, vagueness, and excessive restrictions on free speech.
Step-by-step explanation:
The 1997 Supreme Court ruling in Reno v. ACLU found provisions of the Communications Decency Act (CDA) to be unconstitutional. The Supreme Court declared the CDA unconstitutional for several reasons: it was not content-neutral, it was too vague, and it was not the least drastic means available for keeping minors from viewing indecent material. By criminalizing the transmission of "indecent material" on the internet, the CDA had a chilling effect on free speech by causing many websites to remove constitutionally protected materials for fear of punishment.