I don't believe that Brightpowder, Lax Incense, or any hax items are bad for the metagame, actually. People aren't realizing that this is the first time that Smogon has ever banned an item in the standard metagame. And unlike Moody, they weren't actually overcentralizing, or even used much. And although it may ruin a ladder, there are no ladders in the actual game; not everyone plays a simulator.
And WTF is up with them banning Lax Incense? Even if only Brightpowder was banned, Lax Incense wouldn't return to wreak havoc and vengeance; Brightpowder is only used on annoyers such as Cacturne. The entire banning process was just a bunch of guys winning a bunch of battles, and seeing whether Drizzle and Drought were broken (At least they were serious about that, considering that people actually used those) and then they just decided to ban an item just because they could, without considering the bad effects on the metagame. Like nerfing Cacturne, a Pokémon that isn't even broken with Brightpowder. I don't know about you, but I think that nerfing a Pokémon for no good reason is bad for the metagame because it makes it so Cacturne fans can't use their favorites. And when someone can't use their favorites (outside of when they're put on Ubers, where there's always a way to use your favorites with the proper team support, anyway) then that defeats the whole purpose of tiers. And when the whole purpose of tiers is defeated, then the metagame decays. Cacturne is also fun to use. I remember that Cacturne was my first breed.