Apparently you're unaware of the extremely fuzzy protective blanket religion has in the US. Short of literal criminal acts, they can get away with anything they want, under the guise of "religious freedom".
Name one. Almost all (in recent memory, at least) were prosecuted for either embezzlement or tax fraud. Not for false, erroneous or misleading beliefs.
Not illegal, especially since Camping wasn't even drawing a salary.
Then it'd be time to prosecute all the churches that have billboards, since those might have some effect on the donations made to their churches, who almost all make erroneous, false and misleading claims. They just have the good sense to be more vague and undisprovable with their claims.
