I like where you're coming from, but it doesn't quite work IMO.
Even having the police just knock on your door might be deleterious enough: The point is the outcome is known, expected, likely, and almost certainly has an observable (by third parties that the person ordinarily associates with) negative effect.
Saying something nasty to someone in an online forum, that if ignored will have no effect, is still markedly different; and is readily differentiable.
A first test might be "if I didn't see the speech would it still have an effect".
Even having the police just knock on your door might be deleterious enough: The point is the outcome is known, expected, likely, and almost certainly has an observable (by third parties that the person ordinarily associates with) negative effect.
Saying something nasty to someone in an online forum, that if ignored will have no effect, is still markedly different; and is readily differentiable.
A first test might be "if I didn't see the speech would it still have an effect".