Why not? If you want someone to (not) do something, you need to provide a compelling rationale. Otherwise you're trying to compel some based on your personal preference.
Personally I think wild hyperbole is funny and effective at making a point, so my preference is that the poster continue.
To me, calls for violence are exactly the dividing line between free speech and restricted speech. Show extreme judgement when invoking violent imagery.
> If you want someone to (not) do something, you need to provide a compelling rationale.
OK. Advocating violence is a crime. And text-based communication is notoriously difficult medium to express sarcasm and irony. Crimes are bad, mmmmkay?
Nitpick - advocating violence, specially as a personal vida is not a crime in most countries; promoting violence is, and it depends on the violence -death penalties and stonings are state-sponsored acts of violence, perfectly legal within their applicability in many parts of the world.
Also, crimes arent necessarily "bad", nor requinte violence. abortion in some American states is a crime, and stealing cars is also a crime.
You're probably thinking of assault. Assault requires an imminent threat of physical harm and the apparent ability to inflict the harm.
Mike Tyson threatening to punch someone in a bar is assault. Saying that you're going to set all patent trolls on fire is not, unless you have Human Torch like superpowers.