Maybe certain weapons and items should and shouldnt be banned

[Hauteclere]

I don't know if wormhole potion is banned or not, but I think with TShock in place its protocol is reserved for /tp and /tpa commands, therefore even if you have it in your inventory you cannot use it.
Homing projectile won't work on players, only NPCs. I still remember the time when I can farm pillars without limit, vortex beater with chlorophyte bullet was so OP that it made every other weapons look stupid.
Portal gun is so much fun, and once in a while Panther will forget to ban it. Trolling time xD
And for other weapons that you think they should be banned in duel, you can negotiate with the other party before dueling. Once I participated in a duel with both sides used shoddy copper short sword (and I lost T.T). ML weapons are banned in guild wars after all.