On the serenading example, noise complaints to the police aren't really controversial; the notion of a disturbance of the peace is an old common law one that I think the founders would have recognized.
People who say things like you have just said seem to be implying some sort of sociological theory that remains unspoken: [...] If that theory is true, then is the person who manipulates through communication the criminal, or is it the people who are manipulated into crime? I contend that the latter are wholly culpable.
I think both. If you're exhorting people to commit an act and they do it, you're not morally blameless; the manipulation is itself an activity notwithstanding the fact of its intangibility. This is why we have laws against 'incitement to riot,' as it's a fact that that most people behave differently in crowds and some people make a specialty out of leveraging that to destructive ends.
People who say things like you have just said seem to be implying some sort of sociological theory that remains unspoken: [...] If that theory is true, then is the person who manipulates through communication the criminal, or is it the people who are manipulated into crime? I contend that the latter are wholly culpable.
I think both. If you're exhorting people to commit an act and they do it, you're not morally blameless; the manipulation is itself an activity notwithstanding the fact of its intangibility. This is why we have laws against 'incitement to riot,' as it's a fact that that most people behave differently in crowds and some people make a specialty out of leveraging that to destructive ends.