Stages that are Counterpics that can kill you :Haliberd, Corneria, FrigateOrpheon, Norfair, Castlesiege, PortownAeroDive, MarioCircut, Brinstar,RainbowCruse, Pirateship, JungleJapes, DistantPlanet, Pictochat, Greengreens, Delfino. Those are all of the counter pick stages that the stage is capable of killing you.
Otherstages that can kill you: NewporkCity, MarioBros, Warioware, Spearpillar, Flatzone2, 75m, Rumblefalls, Summit, MushroomyKingdom, BigBlue, Bridge of Elden.
Stages where the stage is more dangerous than the player (atleast in my oppinion): MarioBros, Warioware, Spearpillar, Flatzone2, 75m, Rumblefalls, Mushroomykingdom, Bigblue, Rainbowcruise. In these stages, it doesn't take just a reflect to take care of the stage's issue, but you actually spend more time worried about and taking care of the stage than you do fighting the enemy.
In most, if not all other stages, the issues are very minimal, and it takes about a twitch to deal with the stage's issue. The 3rd set of stages are the only ones that I think deserve banishment. In all others, it's usually yourfault for getting your butt kicked by the stage, or your opponents welldeserved stage kill.