In normal Wifi battles, that is not what I'm talking about. I'm talking in comp Pokemon, in tournaments there are set rules they use. I know it's just a friendly tourney but you shouldn't ban ALL legendaries, if any you should just ban the really strong ones like Rayquaza and Deoxys.Not true, back in Diamond & Pearl (not sure if it still exists) the NPC would not allow you to participate in WiFi battles if you had a specific set of legendaries in your team.
Furthermore, bumping vote requirement to 6.