Openly advocating/encouraging violence, even just against those who are already dead, teaches young impressionable minds that that sort of behaviour is acceptable. They don't see the nuances of it being a joke / being about someone who can't suffer from those words; they just see that speaking about others like that is ok. They then carry that behaviour into their own lives and treat real currently living people like that.
Ban justified. Think on it for your 7 days, and come back a better person.
So do you think that kids should not be allowed on social media? Because by your logic, all of the shit they see on tiktak will make them wanna be a slut.