Yeah, i mean if someone really wants to decapitate someone they can just go to the next best hardware store and get a chainsaw.

https://archive.is/52YjV#selection-515.0-533.242

Butter knife 'an offensive weapon'

A butter knife can be an offensive weapon, the High Court ruled yesterday.

The decision came in the rejection of an appeal by Charlie Brooker, of Welling, Kent, who had been convicted under the Criminal Justice Act of carrying a bladed instrument.

Mark Hardie, appearing for Brooker, argued that the knife had no handle, sharp edges or points and therefore could not fall foul of a law intended to protect people from dangerous weapons.

But Lord Justice Laws, sitting with Mr Justice David Steel, disagreed. He said: "I would accept that a sharp or pointed blade was the paradigm case - however the words of the statute are unqualified and refer to any article that has a blade."

I will bet you that Parliament would be willing to impose a ban on possession of a chainsaw without just cause.

Playing devil's advocate, chainsaws are used for cutting trees and other tasks, they are not inherently a weapon unlike a sword (these are similar arguments to the ones used about gun control). I do find it silly to ban weeb swords, but mostly because I don't think they're ever really used for crimes? Or did I miss some info about a wave of ninja murders in the UK?