> You carefully avoid saying that "spam" isn't subjective, but if you think it is, your reply wouldn't be relevant, so: I doubt you'll have any luck trying to "objectively" establish a criteria for spam classification that nobody disagrees with.
Alright. Spam is when you post something to a space where it's not relevant (not really applicable to Twitter since it doesn't have topical spaces), or post something repeatedly without a good reason.
> "I know your kids go to [specific school], watch out"? Subjective? "I'm going to kill you and your family?" Subjective or straight up threat?
Those are specific threats, which are not protected as free speech.
> "Your post is stupid and you are stupid?"
Nothing wrong with saying that, aside from the fact that it's not constructive and you'd be better off explaining why you disagree.
> "You are clearly politically motivated and not arguing in good faith?"
Same as previous.