It would be pretty neat if the map were made known in advance and the players could vote to ban certain weapons or weapon archetypes. See if the community bans snipers on long distances maps or shotguns on close quarter maps. But I agree, banning weapons does not really make sense -- unless there was a fair way to so so. You'll always have those weapons people complain about, as lower skilled players don't tend to realize it's not the weapon that beats them, it's the player.