I personally think the concept of stochastic terrorism is a rhetorical trick to associate legal speech with terrorism, but I think the argument applies just as well to ElonJet.
This is an interesting term that is worth exploring. A problem with it is that it could apply to huge swaths of people and organizations, e.g. Fox News, the Republican Party, CNN, Democratic Socialists, etc
Basically anything that you don’t like is now considered terrorism.
Free speech is completely dead under this logic.