yeah, decoration/recreation (or do you want to ban the bow and arrow too? maybe ban boxing gloves?)/historical preservation

banning swords is absurd, if anything you want miscreants to use swords because they’re fucking massive and obvious, you can’t conceal a katana.

meanwhile if someone wants to kill and not make that fact visible, they can just… keep a screwdriver in their pocket and stab someone, and you’re never going to ban screwdrivers.