The issue is whether there is speech that is objectionable, and whether free speech has some sort of nearly universal limit if properly considered (yeling fire in a crowded theater, for example) and whether creating a law-free zone might have unintended consequences.
I don't see how a straw man implying that all laws require draconian enforcement really benefits the conversation. So we let child molesters do as they please because somehow any law enforcement would mean total and constant invasion of privacy? Not sure I follow the leap.