Status Moves, and things like Protect are banned for prolonging fights. Protect having 'no benefit'...
Now, its their choice. I can see where status moves can be quite annoying but that is kinda their point. But... All these move bans seem to dumb down the entire game to the point where it just stopped being worth bothering with. Whats the point of playing a little pvp pokemon if they just cut off the huge parts of the metagame? Is it so bad to use a Stallrain?