Are SLAPP suits illegal?
No, parties can attempt to file such suits, but the First Amendment’s
petition clause guarantees the right of all interested parties to attempt to
enlist the government on their side of an issue or dispute. The vast majority of
the case law and commentary — both popular and scholarly — supports that right,
and suggests that the remedy for dissatisfaction with the statements of another
party is more speech directed toward government, not more litigation.