That is not true. Freedom of Speech has always had costs.
In theory perhaps, and there's no doubt that a lie might come back to bite you in the ass. But for the most part everybody gets away with it.
If you yell fire in a crowded theatre, your intent is mayhem and harm, if you slip out the door during the mayhem, chuckling at your clever ruse, then you will likely escape unscathed.
The internet is full of lies. Politics is full of lies. Auto sales and legal procedures are full of lies. Life is full of lies. The jails are not
full of people convicted of lying. Near as I can tell the profits far outweigh the punishments where lies are concerned.
You know what George W Bush said...
"Fool me once shame on you. Fool me twice, won't get fooled again."